Antimony
Symbol: Sb

Atomic Number: 51
Atomic Weight: 121.75
Protons: 51
Neutrons: 70
Electrons: 51
Group: VA

Brief Description:
In its metallic form, antimony is bluish-white, extremely brittle, and flaky. It is not affected by air, but burns brilliantly when heated. It does not conduct heat or electricity very well, and is highly toxic.