Is Selenium a metalloid or nonmetal?
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Is Selenium a metalloid or nonmetal?
Selenium is a metalloid (an element intermediate in properties between the metals and the nonmetals)….selenium.
| atomic number | 34 |
|---|---|
| masses of stable isotopes | 74, 76, 77, 78, 80, 82 |
| melting point | |
| amorphous | 50 °C (122 °F) |
| gray | 217 °C (423 °F) |
Are group 12 metalloids?
Groups 13–16 of the periodic table (orange in the Figure below) are the only groups that contain elements classified as metalloids. In addition to metalloids, they also contain metals, nonmetals, or both. Groups 13–16 fall between the transition metals (in groups 3–12) and the nonmetals called halogens (in group 17).
Is Selenium a molecular element?
Of the list provided, only selenium exists as a molecular element. Molecules are formed when atoms of nonmetals form covalent bonds. Selenium has several allotropes. Allotropes of red selenium form rings with the formula Se8 .
What are metalloids give three examples?
Metalloids are typically semiconductors which means that they both insulate and conduct electricity . The semiconductor property makes metalloid very useful as a computer chip material . They are also called as semi metals. Some important examples of metalloids are as follows : Boron(B), Silicon(Si) and Germanium(Ge).
What are Group 12 elements called?
zinc group element, any of the four chemical elements that constitute Group 12 (IIb) of the periodic table—namely, zinc (Zn), cadmium (Cd), mercury (Hg), and copernicium (Cn).
What groups are metalloids in?
Traditionally they include boron from group 3A, silicon and germanium in group 4A, aresnic and antimony in group 5A and tellurium from group 6A, although sometimes selenium, astatine, polonium and even bismuth have also been considered as metalloids. Typically metalloids are brittle and show a semi-metallic luster.
Why selenium is a metalloid?
Certain allotropes of selenium show features of metalloids, although selenium is considered as a non-metal. In environmental chemistry, we consider selenium as a metalloid because of its similarities with antimony and arsenic in aquatic chemistry.