Antimony (Sb)

William Makowski

General information on Antimony

With the atomic number of 51; Antimony origin known by Stibium which is Latin. Antimony has been know to be around since ancient times, but was finally published in 1540 by Vannoccio Biringuccio. Antimony is known to be metalloid with its 51 protons, 71 neutrons, and 51 electrons. It also involved with the Nitrogen family with its location on the 5th period and in group 15 among the periodic table.

Further look about Antimony

Reactivity - Oxygen

Ionization Energy : 1st: 834 kJ/mol, 2nd: 1594.9 kJ/mol, and 3rd: 2440 kJ/mol.

Interesting Facts

1. Agricola published his description in 1556 and is miscreated for discovering it.

2. China produces the most, exacting between 84% and 88% of Antimony.

3. Antimony has to stable Isotopes being Sb-121 and Sb-123.

4. Antimony was used in ancient Egypt as a form of eyeliner.

Physical and Chemical Properties


1. Silvery, lustrous gray metal that has a Mohs Scale hardness of 3.

2. A Soft metal that was only used to make coins in 1931, but the metal is to weak and break down easy.


1. Can react with oxygen when heated.

2. When scratched with a sharp implement, an exothermic reaction occurs and white fumes are given off as metallic antimony is formed

Work Cited

"Antimony." Ptable. Web. 21 Mar. 2016. <>.

Antimony. The University of Nottingham, 2008. YouTube.

Winter, Mark. "Antimony: The Essentials." WebElements. The University of Sheffield. web

23 Feb. 2016. <>.