| Group | 16 |
|---|---|
| Period | |
| 2 | 8 O |
| 3 | 16 S |
| 4 | 34 Se |
| 5 | 52 Te |
| 6 | 84 Po |
| 7 | 116 Uuh |
The chalcogens are the name for the periodic table group 16 (old-style: VIB or VIA) in the periodic table. 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 period 2 element is one of the Chemical elements in the second row (or period) of the periodic table of the chemical elements. Oxygen (from the Greek roots ὀξύς (oxys (acid literally "sharp" from the taste of acids and -γενής (-genēs (producer literally begetteris the A period 3 element is one of the Chemical elements in the third row (or period) of the periodic table of the elements. Sulfur or sulphur (ˈsʌlfɚ see spelling below) is the Chemical element that has the Atomic number 16 A period 4 element is one of the Chemical elements in the fourth row (or period) of the periodic table of the elements. Selenium (səˈliniəm is a Chemical element with the Atomic number 34 represented by the chemical symbol Se, an atomic mass of 78 A period 5 element is one of the Chemical elements in the fifth row (or period) of the periodic table of the elements. Tellurium (tɪˈlʊəriəm/ /tɛl- is a Chemical element that has the symbol Te and Atomic number 52 A period 6 element is one of the Chemical elements in the sixth row (or period) of the periodic table of the elements, including the Lanthanides Polonium (pəˈloʊniəm is a Chemical element with the symbol Po and Atomic number 84 discovered in 1898 by Marie and Pierre Curie A period 7 element is one of the Chemical elements in the seventh row (or period) of the periodic table of the elements. Ununhexium (ˌjuːnənˈhɛksiəm or /ˌʌnənˈhɛksiəm/ is the temporary name of a synthetic Superheavy element in the Periodic table that has the temporary 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 The periodic table of the chemical elements is a tabular method of displaying the Chemical elements Although precursors to this table exist its invention is It is sometimes known as the oxygen family. It consists of the elements oxygen (O), sulfur (S), selenium (Se), tellurium (Te), the radioactive polonium (Po), and the synthetic ununhexium (Uuh). 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. Oxygen (from the Greek roots ὀξύς (oxys (acid literally "sharp" from the taste of acids and -γενής (-genēs (producer literally begetteris the Sulfur or sulphur (ˈsʌlfɚ see spelling below) is the Chemical element that has the Atomic number 16 Selenium (səˈliniəm is a Chemical element with the Atomic number 34 represented by the chemical symbol Se, an atomic mass of 78 Tellurium (tɪˈlʊəriəm/ /tɛl- is a Chemical element that has the symbol Te and Atomic number 52 Polonium (pəˈloʊniəm is a Chemical element with the symbol Po and Atomic number 84 discovered in 1898 by Marie and Pierre Curie Ununhexium (ˌjuːnənˈhɛksiəm or /ˌʌnənˈhɛksiəm/ is the temporary name of a synthetic Superheavy element in the Periodic table that has the temporary The compounds of the heavier chalcogens (particularly the sulfides, selenides, and tellurides) are collectively known as chalcogenides. The term sulfide ( sulphide in British English) refers to several types of Chemical compounds containing Sulfur in its lowest Oxidation The selenide Ion is Se2&minus A selenide is a chemical compound in which Selenium serves as an Anion with Oxidation number The telluride Ion is Te 2&minus It is the final stable member of the series of dianions O 2&minus S 2&minus Unless grouped with a heavier chalcogen, oxides are not considered chalcogenides. An oxide is a Chemical compound containing at least one Oxygen atom as well as at least one other element
The name is generally considered to mean "ore former" from the Greek chalcos "ore" and -gen "formation". Greek (el ελληνική γλώσσα or simply el ελληνικά — "Hellenic" is an Indo-European language, spoken today by 15-22 million people mainly [1]
Oxygen and sulfur are nonmetals, and polonium, selenium and tellurium are metalloid semiconductors (i. Nonmetal is a term used in Chemistry when classifying the Chemical elements On the basis of their general physical and chemical properties every element in the Metalloid is a term used in Chemistry when classifying the Chemical elements On the basis of their general physical and chemical properties nearly every element A semiconductor' is a Solid material that has Electrical conductivity in between a conductor and an insulator; it can vary over that e. , their electrical properties are between those of a metal and an insulator). An insulator, also called a Dielectric, is a material that resists the flow of Electric current. Nevertheless, tellurium, as well as selenium, is often referred to as a metal when in elemental form.
Chalcogens are quite common as minerals. For example, pyrite (FeS2) is an iron ore and AuTe2 gave its name to the gold rush town of Telluride, Colorado, in the United States. Iron ores are rocks and Minerals from which Metallic Iron can be economically extracted The Town of Telluride is a Home Rule Municipality that is the County seat and the most populous town of San Miguel County in the southwestern The United States of America —commonly referred to as the
The formal oxidation number of the chalcogens is generally −2 in a chalcogenide but other values, such as −1 in pyrite, can be attained. The oxidation number of a central atom in a coordination compound is the charge that it would have if all the Ligands were removed along with the Electron pairs
The highest formal oxidation number +6 is found in sulfates, selenates and tellurates, such as in sodium selenate (Na2SeO4). The selenate Ion is SeO42&minus Selenates are analogous to Sulfates and have similar chemistry The tellurate Ion is TeO42&minus or TeO66&minus Unlike sulfate tellurate is a somewhat good oxidizer it can be reduced Modern chemical understanding based on quantum theory supersedes the use of formal oxidation numbers in favour of a many-electron wavefunction approach allowing detailed computer simulation. Quantum chemistry is a branch of Theoretical chemistry, which applies Quantum mechanics and Quantum field theory to address issues and problems in In Computational physics and Computational chemistry, the Hartree-Fock ( HF) method is an approximate method for the determination of the ground-state The former concept, while flawed, is still useful in thought experiments.
| Nonmetals | Metalloids | Poor metals | Atomic numbers in red are gases | Atomic numbers in black are solids | Solid borders indicate primordial elements (older than the Earth) | Dashed borders indicate radioactive natural elements | Dotted borders indicate radioactive synthetic elements |
|---|
See also
External links
Nonmetal is a term used in Chemistry when classifying the Chemical elements On the basis of their general physical and chemical properties every element in the Metalloid is a term used in Chemistry when classifying the Chemical elements On the basis of their general physical and chemical properties nearly every element EARTH was a short-lived Japanese vocal trio which released 6 singles and 1 album between 2000 and 2001 Radioactive decay is the process in which an unstable Atomic nucleus loses energy by emitting ionizing particles and Radiation. In chemistry the Chemical elements labeled as synthetic are too unstable to be found naturally on Earth. Gold chalcogenides are compounds formed between Gold and one of the Chalcogens elements from Group 16 of the Periodic table: Oxygen The periodic table of the chemical elements is a tabular method of displaying the Chemical elements Although precursors to this table exist its invention is
Dapyx Software network: MP3 Explorer | Ebook Manager | Zenithic