Cobalt

Statistics:

• Name: Cobalt
• Symbol: Co
• Classification: Transition Metal
• Atomic Number: 27
• Atomic Mass: 58.933195 g/mol
• Density: 8.89 g/cm³
• Melting: 1495°C
• Boiling: 2870°C
• Protons & Electrons:27
• Neutrons:32
• Discovered: 1735
• Discovered By: Brandt
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Electrons Per Energy Level:

• Level 1: 2
• Level 2: 8
• Level 3: 15
• Level 4: 2

Isotopes:

Isotope: Half-life

• ⁵⁶Co: 77.27 days
• ⁵⁷Co: 271.79 days
• ⁵⁸Co: 70.86 days
• ^58m1Co: 9.04 hours
• ⁵⁹Co: stable
• ⁶⁰Co: 5.2714 years
• ^60m1Co: 10.467 minutes
• ⁶¹Co: 1.650 hours

Brief Summary

Cobalt is a Transition Metal with the symbol 'Co' and contains 27 Protons & Electrons with 32 neutrons in the nucleus of the atom. Cobalt has an atomic mass of 58.933195 g/mol and, at a temperature of 20°C, has a density of 8.89 g/cm³. It will melt at a temperature of 1495°C and boil at 2870°C.

Cobalt was discovered by Brandt in 1735 and is named 'Cobalt' German word "kobalt" or "kobold" meaing "evil spirit".

Some common usages for Cobalt: magnets, ceramics and special types of glass.

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

Cobalt :: Co :: 27 - Chemical Element. 10 Mar. 2010 <http://www.chemicalelement.com/element/cobalt.html>.