Antimony

Statistics:

• Name: Antimony
• Symbol: Sb
• Classification: Metalloid
• Atomic Number: 51
• Atomic Mass: 121.76 g/mol
• Density: 6.69 g/cm³
• Melting: 630.7°C
• Boiling: 1750°C
• Protons & Electrons:51
• Neutrons:71
• Discovered: prehistoric
• Discovered By: unknown
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Electrons Per Energy Level:

• Level 1: 2
• Level 2: 8
• Level 3: 18
• Level 4: 18
• Level 5: 5

Isotopes:

Isotope: Half-life

• ¹¹⁷Sb: 2.80 hours
• ¹¹⁹Sb: 38.19 hours
• ¹²⁰Sb: 15.89 minutes
• ¹²¹Sb: stable
• ¹²²Sb: 2.7238 days
• ¹²³Sb: stable
• ¹²⁴Sb: 60.20 days
• ¹²⁵Sb: 2.7582 years
• ¹²⁶Sb: 12.46 days
• ^126m1Sb: 19.15 minutes
• ¹²⁷Sb: 3.85 days
• ¹²⁹Sb: 4.40 hours

Brief Summary

Antimony is a Metalloid with the symbol 'Sb' and contains 51 Protons & Electrons with 71 neutrons in the nucleus of the atom. Antimony has an atomic mass of 121.76 g/mol and, at a temperature of 20°C, has a density of 6.69 g/cm³. It will melt at a temperature of 630.7°C and boil at 1750°C.

Antimony has been known since prehistoric times and is named 'Antimony' Greek words "anti" meaning "opposed" and "monos" meaning "solitude".

Some common usages for Antimony: hardens lead, plastics and other chemicals.

Definitions and Notes

Density listed is at a temperature of 20°C.

Isotopes are forms of an element who have the same atomic number but different mass because they contain different number of neutrons.

Half-life is the time required for a quantity of a subject to fall to half of its current quantity.

MLA Citing Format

Antimony :: Sb :: 51 - Chemical Element. 10 Mar. 2010 <http://www.chemicalelement.com/element/antimony.html>.