Antimony (Sb), element 51 – Learn Acer periodic table

Antimony

Metalloid, atomic number 51.

Antimony is a chemical element with symbol Sb (from Latin:stibium) and atomic number 51. A lustrous gray metalloid, it is found in nature mainly as the sulfide mineral stibnite (Sb2S3). Antimony compounds have been known since ancient times and were used for cosmetics; metallic antimony was also known, but it was erroneously identified as lead upon its discovery.

Facts

Symbol Sb. Atomic mass 121.7601 u. Group 15, period 5. Electron configuration [Kr] 4d10 5s2 5p3. Electrons per shell 2, 8, 18, 18, 5. State at room temperature: Solid. Melting point 630.6 °C, boiling point 1634.8 °C. Discovered by unknown, before 3000 BC.

Element data from Wikipedia, CC BY-SA 3.0.