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For other uses, see Radium (disambiguation). Radium may refer to Radium, the chemical element;Place names Radium Kansas, United States Radium Hot
88 francium ← radium → actinium
Ba
↑
Ra
↓
Ubn
General
Name, Symbol, Number radium, Ra, 88
Chemical series alkaline earth metals
Group, Period, Block 2, 7, s
Appearance silvery white metallic
Standard atomic weight (226)  g·mol−1
Electron configuration [Rn] 7s²
Electrons per shell 2, 8, 18, 32, 18, 8, 2
Physical properties
Phase solid
Density (near r.t.) 5. Francium (ˈfrænsiəm formerly known as eka-caesium and actinium K, is a Chemical element that has the symbol Fr and Actinium (ækˈtɪniəm is a radioactive Chemical element with the symbol Ac and Atomic number 89 which was discovered in 1899, the earliest Barium (ˈbɛəriəm is a Chemical element. It has the symbol Ba, and Atomic number 56 |-||-| Unbinilium (ˌʌnbɪˈnɪliəm also called eka - Radium, is This is a typical display of the periodic table of the elements and contains the symbol and Atomic number of each element Wikipedia talkFeatured lists for an explanation of this and other inclusion tags below -->This is a list of Chemical elements, sorted by name Wikipedia talkFeatured lists for an explanation of this and other inclusion tags below -->This is a list of chemical elements by symbol, including the A table of Chemical elements ordered by Atomic number and color coded according to type of element In Chemistry a group, also known as a family, is a vertical column in the Periodic table of the Chemical elements There are 18 groups in Biological occurrences Beryllium's low aqueous solubility means it is rarely available to biological systems it has no known role in living organisms and when encountered In Chemistry a group, also known as a family, is a vertical column in the Periodic table of the Chemical elements There are 18 groups in In the Periodic table of the elements, a period is a horizontal row of the table A block of the Periodic table of elements is a set of adjacent groups The respective highest-energy electrons in each element in a block belong to the same Atomic Biological occurrences Beryllium's low aqueous solubility means it is rarely available to biological systems it has no known role in living organisms and when encountered A period 7 element is one of the Chemical elements in the seventh row (or period) of the periodic table of the elements. See also Electron configuration The atomic mass (ma is the Mass of an atom most often expressed in unified atomic mass units The atomic mass may be considered to be the total mass In Atomic physics and Quantum chemistry, electron configuration is the arrangement of Electrons in an Atom, Molecule, or other Radon (ˈreɪdɒn is the Chemical element that has the symbol Rn and Atomic number 86 The electron is a fundamental Subatomic particle that was identified and assigned the negative charge in 1897 by J An electron shell may be crudely thought of as an Orbit followed by Electrons around an Atom nucleus. In the Physical sciences a phase is a Set of states of a macroscopic physical system that have relatively uniform chemical composition and physical properties A solid' object is in the States of matter characterized by resistance to Deformation and changes of Volume. The density of a material is defined as its Mass per unit Volume: \rho = \frac{m}{V} Different materials usually have different Room temperature (also referred to as ambient temperature) is a common term to denote a certain Temperature within enclosed space at which humans are accustomed 5  g·cm−3
Melting point 973 K
(700 °C, 1292 °F)
Boiling point 2010 K
(1737 °C, 3159 °F)
Heat of fusion 8. The melting point of a solid is the temperature range at which it changes state from solid to Liquid. The kelvin (symbol K) is a unit increment of Temperature and is one of the seven SI base units The Kelvin scale is a thermodynamic The Celsius Temperature scale was previously known as the centigrade scale. Fahrenheit is a temperature scale named after Daniel Gabriel Fahrenheit (1686–1736 a German Physicist who proposed it in 1724 The boiling point of a liquid is the temperature at which the Vapor pressure of the liquid equals the environmental pressure surrounding the liquid The kelvin (symbol K) is a unit increment of Temperature and is one of the seven SI base units The Kelvin scale is a thermodynamic The Celsius Temperature scale was previously known as the centigrade scale. Fahrenheit is a temperature scale named after Daniel Gabriel Fahrenheit (1686–1736 a German Physicist who proposed it in 1724 The standard Enthalpy of fusion (symbol \Delta{}H_{fus} also known as the heat of fusion or specific melting heat, is the amount of 5  kJ·mol−1
Heat of vaporization 113  kJ·mol−1
Vapor pressure
P(Pa) 1 10 100 1 k 10 k 100 k
at T(K) 819 906 1037 1209 1446 1799
Atomic properties
Crystal structure cubic body centered
Oxidation states 2
(strongly basic oxide)
Electronegativity 0. The joule per mole (symbol J·mol-1 is an SI derived unit of energy per amount of material The enthalpy of vaporization, (symbol \Delta{}_{v}H also known as the heat of vaporization or heat of evaporation, is the Energy required The joule per mole (symbol J·mol-1 is an SI derived unit of energy per amount of material Vapor pressure (also known as equilibrium vapor pressure or saturation vapor pressure) is the Pressure of a Vapor in equilibrium In Mineralogy and Crystallography, a crystal structure is a unique arrangement of Atoms in a Crystal. In Chemistry, the oxidation state is an indicator of the degree of Oxidation of an Atom in a Chemical compound. In Chemistry, a base is most commonly thought of as an aqueous substance that can accept Protons This refers to the Brønsted-Lowry theory of acids and " Electronegativity " is the opposite of " Electropositivity," which describes an element's ability to donate electrons 9 (Pauling scale)
Ionization energies 1st: 509. The ionization potential, ionization energy or EI of an Atom or Molecule is the Energy required to remove an Electron 3 kJ/mol
2nd: 979. The joule per mole (symbol J·mol-1 is an SI derived unit of energy per amount of material 0 kJ/mol
Atomic radius 215  pm
Miscellaneous
Magnetic ordering nonmagnetic
Electrical resistivity (20 °C) 1 µ Ω·m
Thermal conductivity (300 K) 18. Atomic radius, and more generally the size of an atom, is not a precisely defined Physical quantity, nor is it constant in all circumstances A picometre ( American spelling: picometer, symbol pm) is a unit of Length in the Metric system, equal to one trillionth In Physics, magnetism is one of the Phenomena by which Materials exert attractive or repulsive Forces on other Materials. Electrical resistivity (also known as specific electrical resistance) is a measure of how strongly a material opposes the flow of Electric current. In Physics, thermal conductivity, k is the property of a material that indicates its ability to conduct Heat. 6  W·m−1·K−1
CAS registry number 7440-14-4
Selected isotopes
Main article: Isotopes of radium
iso NA half-life DM DE (MeV) DP
223Ra  ? 11. CAS registry numbers are unique numerical identifiers for Chemical compounds Polymers biological sequences mixtures and Alloys They are also referred to Radium ( Ra) has no stable Isotopes A standard Atomic mass cannot be given Isotopes (Greek isos = "equal" tópos = "site place" are any of the different types of atoms ( Nuclides In Chemistry, natural abundance (NA refers to the abundance Isotopes of a Chemical element as naturally found on a planet Half-Life (computer-game page here It's already listed in the disambiguation page Radioactive decay is the process in which an unstable Atomic nucleus loses energy by emitting ionizing particles and Radiation. The decay energy is the Energy released by a Nuclear decay. The energy difference of the Reactants is often written as Q: where Q In Nuclear physics, a decay product, also known as a daughter product, daughter isotope or daughter nuclide, is a Nuclide 43 d alpha 5. A day (symbol d is a unit of Time equivalent to 24 Hours and the duration of a single Rotation of planet Earth with respect to the Alpha decay is a type of radioactive decay in which an Atomic nucleus emits an Alpha particle (two protons and two neutrons bound together into a particle 99 219Rn
224Ra  ? 3. Radon (ˈreɪdɒn is the Chemical element that has the symbol Rn and Atomic number 86 6319 d alpha 5. A day (symbol d is a unit of Time equivalent to 24 Hours and the duration of a single Rotation of planet Earth with respect to the Alpha decay is a type of radioactive decay in which an Atomic nucleus emits an Alpha particle (two protons and two neutrons bound together into a particle 789 220Rn
226Ra trace 1602 y alpha 4. Radon (ˈreɪdɒn is the Chemical element that has the symbol Rn and Atomic number 86 A trace radioisotope is a Radioisotope that occurs naturally in trace amounts (i A year (from Old English gēr) is the time between two recurrences of an event related to the Orbit of the Earth around the Sun Alpha decay is a type of radioactive decay in which an Atomic nucleus emits an Alpha particle (two protons and two neutrons bound together into a particle 871 222Rn
228Ra syn 6. Radon (ˈreɪdɒn is the Chemical element that has the symbol Rn and Atomic number 86 A synthetic radioisotope is a Radionuclide that is not found in nature no natural process or mechanism exists which produces it or it is so unstable that it decays away in 7 y beta- 0. In Nuclear physics, beta decay is a type of Radioactive decay in which a Beta particle (an Electron or a Positron) is emitted 046 228Ac
References

Radium (pronounced /ˈreɪdiəm/) is a radioactive chemical element which has the symbol Ra and atomic number 88. Actinium (ækˈtɪniəm is a radioactive Chemical element with the symbol Ac and Atomic number 89 which was discovered in 1899, the earliest Recommended values for many properties of the elements together with various references are collected on these data pages A chemical element is a type of Atom that is distinguished by its Atomic number; that is by the number of Protons in its nucleus. See also List of elements by atomic number In Chemistry and Physics, the atomic number (also known as the proton Its appearance is almost pure white, but it readily oxidizes on exposure to air, turning black. Redox (shorthand for reduction-oxidation reaction describes all Chemical reactions in which atoms have their Oxidation number ( Oxidation state Radium is an alkaline earth metal that is found in trace amounts in uranium ores. Biological occurrences Beryllium's low aqueous solubility means it is rarely available to biological systems it has no known role in living organisms and when encountered Uranium (jʊˈreɪniəm is a silvery-gray Metallic Chemical element in the It is extremely radioactive. Radioactive decay is the process in which an unstable Atomic nucleus loses energy by emitting ionizing particles and Radiation. Its most stable isotope, 226Ra, has a half-life of 1602 years and decays into radon gas. Isotopes (Greek isos = "equal" tópos = "site place" are any of the different types of atoms ( Nuclides Half-Life (computer-game page here It's already listed in the disambiguation page Radon (ˈreɪdɒn is the Chemical element that has the symbol Rn and Atomic number 86

Contents

Notable characteristics

The heaviest of the alkaline earth metals, radium is intensely radioactive and resembles barium in its chemical behavior. Biological occurrences Beryllium's low aqueous solubility means it is rarely available to biological systems it has no known role in living organisms and when encountered Barium (ˈbɛəriəm is a Chemical element. It has the symbol Ba, and Atomic number 56 This metal is found in tiny quantities in the uranium ore pitchblende, and various other uranium minerals. A mineral is a naturally occurring substance formed through geological processes that has a characteristic chemical composition a highly ordered atomic structure and specific Radium preparations are remarkable for maintaining themselves at a higher temperature than their surroundings, and for their radiations, which are of three kinds: alpha particles, beta particles, and gamma rays. Temperature is a physical property of a system that underlies the common notions of hot and cold something that is hotter generally has the greater temperature Alpha particles (named after and denoted by the first letter in the Greek alphabet, α consist of two Protons and two Neutrons bound together into a Beta particles are high-energy high-speed Electrons or Positrons emitted by certain types of Radioactive nuclei such as Potassium -40 Gamma rays (denoted as &gamma) are a form of Electromagnetic radiation or light emission of frequencies produced by sub-atomic particle interactions Radium also produces neutrons when mixed with beryllium. This article is a discussion of neutrons in general For the specific case of a neutron found outside the nucleus see Free neutron. Beryllium (bəˈrɪliəm is a Chemical element with the symbol Be and Atomic number 4

When freshly prepared, pure radium metal is brilliant white, but blackens when exposed to air (probably due to nitride formation). In chemistry a nitride is a compound of Nitrogen with a less Electronegative element where nitrogen has an Oxidation state of -3 Radium is luminescent (giving a faint blue color), reacts violently with water and oil to form radium hydroxide and is slightly more volatile than barium. Luminescence is also the title of an album by singer Anggun. Luminescence is Light not generated by high temperatures alone Water is a common Chemical substance that is essential for the survival of all known forms of Life. An oil is a substance that is in a viscous Liquid state ( "oily") at ambient temperatures or slightly warmer and is Barium (ˈbɛəriəm is a Chemical element. It has the symbol Ba, and Atomic number 56 The normal phase of radium is a solid.

Applications

Some of the few practical uses of radium are derived from its radioactive properties. More recently discovered radioisotopes, such as 60Co and 137Cs, are replacing radium in even these limited uses because several of these isotopes are more powerful emitters, safer to handle, and available in more concentrated form. A radionuclide is an Atom with an unstable nucleus, which is a nucleus characterized by excess energy which is available to be imparted either to a newly-created Cobalt-60 (60Co is a Radioactive isotope of Cobalt, with a Half life of 5 Caesium-137 (also spelled cesium is a radioactive Isotope of Caesium which is formed mainly by Nuclear fission.

When mixed with beryllium it is a neutron source for physics experiments. Beryllium (bəˈrɪliəm is a Chemical element with the symbol Be and Atomic number 4 Neutron source is a general term referring to a variety devices that emit Neutrons, irrespective of the mechanism used to produce the neutrons Physics (Greek Physis - φύσις in everyday terms is the Science of Matter and its motion.

Historical uses

Radium was formerly used in self-luminous paints for watches, nuclear panels, aircraft switches, clocks, and instrument dials. Luminescence is also the title of an album by singer Anggun. Luminescence is Light not generated by high temperatures alone More than 100 former watch dial painters who used their lips to shape the paintbrush died from the radiation from the radium that had become stored in their bones. The Radium Girls were women subjected to radiation exposure at the United States Radium Corporation factory in Orange New Jersey around 1917 Soon afterward, the adverse effects of radioactivity became widely known. Radium was still used in dials as late as the 1950s. Although tritium's beta radiation is potentially dangerous if ingested, it has replaced radium in these applications. Tritium (ˈtɹɪtiəm symbol or, also known as Hydrogen-3) is a radioactive Isotope of Hydrogen. Beta particles are high-energy high-speed Electrons or Positrons emitted by certain types of Radioactive nuclei such as Potassium -40

During the 1930s it was found that workers' exposure to radium by handling luminescent paints caused serious health effects which included sores, anemia and bone cancer. Luminescence is also the title of an album by singer Anggun. Luminescence is Light not generated by high temperatures alone Anemia ( AmE) or anæmia/anaemia ( BrE) (from the Ancient Greek grc-Latn anaîmia, meaning “without blood” is defined as a qualitative Bone tumor is an inexact term which can be used for both Benign and Malignant abnormal growths found in bone but is most commonly used for primary Tumors This use of radium was stopped soon afterward. This is because radium is treated as calcium by the body, and deposited in the bones, where radioactivity degrades marrow and can mutate bone cells. Calcium (ˈkælsiəm is the Chemical element with the symbol Ca and Atomic number 20 Bone marrow is the flexible tissue found in the hollow interior of Bones In adults marrow in large bones produces new Blood cells It constitutes 4% of The litigation and ultimate deaths of five "Radium Girl" employees who had used radium-based luminous paints on the dials of watches and clocks had a significant impact on the formulation of occupational disease labor law. The Radium Girls were women subjected to radiation exposure at the United States Radium Corporation factory in Orange New Jersey around 1917 Luminous (or luminescent) paint exhibits Luminescence. In other words it gives off visible Light through Fluorescence, Phosphorescence An occupational disease is any chronic ailment that occurs as a result of work or occupational activity Labour law (also known as employment or labor law is the body of Laws administrative rulings and precedents which address the legal rights of and restrictions

Radium was also put in some foods for taste and as a preservative, but also exposed many people to radiation. Radium was once an additive in products like toothpaste, hair creams, and even food items due to its supposed curative powers. Such products soon fell out of vogue and were prohibited by authorities in many countries, after it was discovered they could have serious adverse health effects. (See for instance Radithor. Radithor was a well known Patent medicine / Snake oil that is possibly the best known example of Radioactive quackery. ) Spas featuring radium-rich water are still occasionally touted as beneficial, such as those in Misasa, Tottori, Japan. A destination spa is a short term residential/lodging facility with the primary purpose of guiding individual spa-goers to develop healthy habits is a town located in Tōhaku District, Tottori, Japan. It is also home to the official treasure of Sanbutsuji and the Okayama Hospital For a topic outline on this subject see List of basic Japan topics.

Radium (usually in the form of radium chloride) is used in medicine to produce radon gas which in turn is used as a cancer treatment. Radium chloride, RaCl2 was the first Radium compound to be prepared in a pure state and was the basis of Marie Curie 's original separation of Medicine is the art and science of healing It encompasses a range of Health care practices evolved to maintain and restore Human Health by the Radon (ˈreɪdɒn is the Chemical element that has the symbol Rn and Atomic number 86 Cancer (medical term Malignant Neoplasm) is a class of Diseases in which a group of cells display uncontrolled The isotope 223Ra is currently under investigation for use in medicine as cancer treatment of bone metastasis. Medicine is the art and science of healing It encompasses a range of Health care practices evolved to maintain and restore Human Health by the Cancer (medical term Malignant Neoplasm) is a class of Diseases in which a group of cells display uncontrolled Metastasis ( Greek: displacement μετά=next + στάσις=placement, plural metastases) sometimes abbreviated mets,

History

Radium (Latin radius, ray) was discovered by Marie Skłodowska-Curie and her husband Pierre in 1898 in pitchblende from North Bohemia, in the Czech Republic (area around Jáchymov). Latin ( lingua Latīna, laˈtiːna is an Italic language, historically spoken in Latium and Ancient Rome. Pierre Curie (15 May 1859 &ndash 19 April 1906 was a French physicist, a pioneer in Crystallography, Magnetism, Piezoelectricity Bohemia (Čechy; Bohemia Czechy is a historical region in central Europe, occupying the western two-thirds of the traditional Czech Lands, currently the For other places called Joachimsthal see Joachimsthal (disambiguation Jáchymov (ˈjaxɪmof in German originally Thal, later Sankt Joachimsthal While studying pitchblende the Curies removed uranium from it and found that the remaining material was still radioactive. Uranium (jʊˈreɪniəm is a silvery-gray Metallic Chemical element in the Radioactive decay is the process in which an unstable Atomic nucleus loses energy by emitting ionizing particles and Radiation. They then separated out a radioactive mixture consisting mostly of barium which gave a brilliant green flame color and crimson carmine spectral lines which had never been documented before. Barium (ˈbɛəriəm is a Chemical element. It has the symbol Ba, and Atomic number 56 Crimson is a strong bright deep Red color combined with some Blue, resulting in a tiny degree of Purple. A spectral line is a dark or bright line in an otherwise uniform and continuous spectrum, resulting from an excess or deficiency of photons in a narrow frequency range compared The Curies announced their discovery to the French Academy of Sciences on 26 December 1898. The French Academy of Sciences ( French: Académie des sciences) is a Learned society, founded in 1666 by Louis XIV at the Events 1481 - Battle of Westbrook - Holland defeats troops of Utrecht. Year 1898 ( MDCCCXCVIII) was a Common year starting on Saturday (link will display the full calendar of the Gregorian calendar (or a Common

In 1902, radium was isolated as a pure metal by Curie and André-Louis Debierne through the electrolysis of a pure radium chloride solution by using a mercury cathode and distilling in an atmosphere of hydrogen gas. The M acro E xpansion T emplate A ttribute L anguage complements TAL, providing macros which allow the reuse of code across André-Louis Debierne (Paris July 14, 1874 - August 31, 1949, Paris was a French Chemist and the discoverer of the element In chemistry and manufacturing electrolysis is a method of separating chemically bonded elements and compounds by passing an Electric current The chloride Ion is formed when the element Chlorine picks up one Electron to form an Anion (negatively-charged ion Cl&minus Mercury (ˈmɜrkjʊri also called quicksilver or hydrargyrum, is a Chemical element with the symbol Hg ( Latinized hydrargyrum A cathode is an Electrode through which (positive Electric current flows out of a polarized electrical device Distillation is a method of separating Mixtures based on differences in their volatilities in a boiling liquid mixture Hydrogen (ˈhaɪdrədʒən is the Chemical element with Atomic number 1

Historically the decay products of radium were known as radium A, B, C, etc. These are now known to be isotopes of other elements as follows:

Isotope
Radium emanation 222Rn
Radium A 218Po
Radium B 214Pb
Radium C 214Bi
Radium C1 214Po
Radium C2 210Tl
Radium D 210Pb
Radium E 210Bi
Radium F 210Po

On February 4, 1936 radium E became the first radioactive element to be made synthetically. Radon (ˈreɪdɒn is the Chemical element that has the symbol Rn and Atomic number 86 Polonium (pəˈloʊniəm is a Chemical element with the symbol Po and Atomic number 84 discovered in 1898 by Marie and Pierre Curie Characteristics Lead has a dull luster and is a dense, Ductile, very soft highly Bismuth (ˈbɪzməθ is a Chemical element that has the symbol Bi and Atomic number 83 Thallium (ˈθæliəm is a Chemical element with the symbol Tl and Atomic number 81 Events 211 - Roman Emperor Septimius Severus dies leaving the Roman Empire in the hands of his two quarrelsome sons Year 1936 ( MCMXXXVI) was a Leap year starting on Wednesday (link will display the full calendar of the Gregorian calendar. Radioactive decay is the process in which an unstable Atomic nucleus loses energy by emitting ionizing particles and Radiation.

One unit for radioactivity, the non-SI curie, is based on the radioactivity of 226Ra (see Radioactivity). A CURIE (short for Compact URI) is an abbreviated URI expressed in CURIE syntax and may be found in both XML and non-XML grammars Radioactive decay is the process in which an unstable Atomic nucleus loses energy by emitting ionizing particles and Radiation.

Occurrence

Radium is a decay product of uranium and is therefore found in all uranium-bearing ores. In Nuclear physics, a decay product, also known as a daughter product, daughter isotope or daughter nuclide, is a Nuclide An ore is a volume of rock containing components or Minerals in a mode of occurrence that renders it valuable for mining Radium was originally acquired from pitchblende ore from Joachimsthal, Bohemia (One metric ton of pitchblende yields 0. For other places called Joachimsthal see Joachimsthal (disambiguation Jáchymov (ˈjaxɪmof in German originally Thal, later Sankt Joachimsthal This article is about the tonne or metric ton For other tons see Ton. 0001 grams of radium). For other uses of the words gram or gramme see Gram (disambiguation. Carnotite sands in Colorado provide some of the element, but richer ores are found in the Democratic Republic of the Congo and the Great Lakes area of Canada, and can also be extracted from uranium processing waste. Carnotite is a Potassium Uranium Vanadate Mineral with Chemical formula: K 2( U[[oxygen O]]22( The State of Colorado ( or chiefly by nonresidents) is a state located in the Rocky Mountain region of the United States of America. The Democratic Republic of the Congo (République démocratique du Congo often referred to as DR Congo, DRC or RDC, and formerly known or referred to The Laurentian Great Lakes are a chain of freshwater lakes located in eastern North America, on the Canada–United States border. Country to "Dominion of Canada" or "Canadian Federation" or anything else please read the Talk Page Large uranium deposits are located in Ontario, New Mexico, Utah, Virginia, Australia, and in other places. Ontario (ɒnˈtɛrioʊ is a province located in the central part of Canada, the largest by population and second largest after Quebec New Mexico ( is a state located in the southwestern region of the United States of America. The State of Utah (ˈjuːtɔː or) is a western state of the United States. The Commonwealth of Virginia ( is an American state For a topic outline on this subject see List of basic Australia topics.

Compounds

Its compounds color flames crimson carmine (rich red or crimson color with a shade of purple) and give a characteristic spectrum. A chemical compound is a substance consisting of two or more different elements chemically bonded together in a fixed proportion by Mass. Crimson is a strong bright deep Red color combined with some Blue, resulting in a tiny degree of Purple. The electromagnetic (EM spectrum is the range of all possible Electromagnetic radiation frequencies Due to its geologically short half life and intense radioactivity, radium compounds are quite rare, occurring almost exclusively in uranium ores. Half-Life (computer-game page here It's already listed in the disambiguation page

See also radium compounds. Fluorine, fluorum meaning "to flow" is the Chemical element with the symbol F and Atomic number 9 Radium chloride, RaCl2 was the first Radium compound to be prepared in a pure state and was the basis of Marie Curie 's original separation of Chlorine (ˈklɔriːn from the Greek word 'χλωρóς' ( khlôros, meaning 'pale green' is the Chemical element with Atomic number 17 and Radium bromide is the Bromide Salt of Radium, with the formula RaBr2 Iodine (ˈaɪədaɪn ˈaɪədɪn or /ˈaɪədiːn/ from ιώδης iodes "violet" is a Chemical element that has the symbol I and Atomic Oxygen (from the Greek roots ὀξύς (oxys (acid literally "sharp" from the taste of acids and -γενής (-genēs (producer literally begetteris the Nitrogen (ˈnaɪtɹəʤɪn is a Chemical element that has the symbol N and Atomic number 7 and Atomic weight 14

Isotopes

Radium has 25 different known isotopes, four of which are found in nature, with 226Ra being the most common. Isotopes (Greek isos = "equal" tópos = "site place" are any of the different types of atoms ( Nuclides 223Ra, 224Ra, 226Ra and 228Ra are all generated in the decay of either U or Th. Uranium (jʊˈreɪniəm is a silvery-gray Metallic Chemical element in the Thorium (ˈθɔːriəm is a Chemical element with the symbol Th and Atomic number 90 226Ra is a product of 238U decay, and is the longest-lived isotope of radium with a half-life of 1602 years; next longest is 228Ra, a product of 232Th breakdown, with a half-life of 6. Half-Life (computer-game page here It's already listed in the disambiguation page 7 years.

Radioactivity

Radium is over one million times more radioactive than the same mass of uranium. Uranium (jʊˈreɪniəm is a silvery-gray Metallic Chemical element in the Its decay occurs in at least seven stages; the successive main products have been studied and were called radium emanation or exradio (this is radon), radium A (polonium), radium B (lead), radium C (bismuth), etc. Radon (ˈreɪdɒn is the Chemical element that has the symbol Rn and Atomic number 86 Polonium (pəˈloʊniəm is a Chemical element with the symbol Po and Atomic number 84 discovered in 1898 by Marie and Pierre Curie Characteristics Lead has a dull luster and is a dense, Ductile, very soft highly Bismuth (ˈbɪzməθ is a Chemical element that has the symbol Bi and Atomic number 83 Radon is a heavy gas and the later products are solids. Radon (ˈreɪdɒn is the Chemical element that has the symbol Rn and Atomic number 86 These products are themselves radioactive elements, each with an atomic weight a little lower than its predecessor.

Radium loses about 1% of its activity in 25 years, being transformed into elements of lower atomic weight with lead being the final product of disintegration. Characteristics Lead has a dull luster and is a dense, Ductile, very soft highly

The SI unit of radioactivity is the becquerel (Bq), equal to one disintegration per second. The becquerel (symbol Bq) is the SI derived unit of radioactivity. The curie is a non-SI unit defined as that amount of radioactivity which has the same disintegration rate as 1 gram of Ra-226 (3. A CURIE (short for Compact URI) is an abbreviated URI expressed in CURIE syntax and may be found in both XML and non-XML grammars 7 x 1010 disintegrations per second, or 37 GBq).

Safety

Handling of radium has been blamed for Marie Curie's premature death.

Further reading

References

External links

Dictionary

radium

-noun

  1. a radioactive metallic chemical element (symbol Ra) with an atomic number of 88.
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