Antimony

Antimony
Properties
Atomic symbol	Sb
Atomic number	51
Classification	Standard Metal
Atomic mass	121.8 amu
Other Information
Date of discovery	Antimony has been known since ancient times.
Name of discoverer	Unknown
Name origin	From the Greek anti and monos.
Uses	Hardens lead, plastics, and chemicals.
Obtained from	Stibnite and Valentinite.

Antimony (Sb) is a toxic, flaky, brittle element with the symbol Sb (Latin: stibium, meaning "mark") and atomic number 51. It is one of the few elements which is neither a metal or a non-metal. It does not react with air, but burns brightly when ignited. Since it is not a metal, antimony is a poor conductor of both heat and electricity. The stable form of antimony is a blue-white metalloid. Yellow and black antimony are unstable non-metals. Antimony is used in flame-proofing, paints, ceramics, enamels, a wide variety of alloys, electronics, and rubber.