| |
Selenium is not really a metal, being more akin to sulphur than the other similar element tellurium. Like sulphur, it exists in a number of allotropic forms, the main ones being red and grey selenium.
| |
hydrogen (H) carbon (C) nitrogen (N) oxygen (O) fluorine (F) phosphorus (P) sulfur (S) chlorine (Cl) selenium (Se) bromine (Br) iodine (I) astatine (At) ...
| |
 See also: Stone, Plastic, Copper, Clay, Steel
|
