Calcium

Statistics:

• Name: Calcium
• Symbol: Ca
• Classification: Alkaline Earth Metal
• Atomic Number: 20
• Atomic Mass: 40.078 g/mol
• Density: 1.54 g/cm³
• Melting: 839°C
• Boiling: 1487°C
• Protons & Electrons:20
• Neutrons:20
• Discovered: 1808
• Discovered By: Davy
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Electrons Per Energy Level:

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

Isotopes:

Isotope: Half-life

• ⁴⁰Ca: stable
• ⁴¹Ca: 103000 years
• ⁴²Ca: stable
• ⁴³Ca: stable
• ⁴⁴Ca: stable
• ⁴⁵Ca: 162.61 days
• ⁴⁶Ca: stable
• ⁴⁷Ca: 4.536 days
• ⁴⁸Ca: 6e+18 y
• ⁴⁹Ca: 8.718 m

Brief Summary

Calcium is a Alkaline Earth Metal with the symbol 'Ca' and contains 20 Protons & Electrons with 20 neutrons in the nucleus of the atom. Calcium has an atomic mass of 40.078 g/mol and, at a temperature of 20°C, has a density of 1.54 g/cm³. It will melt at a temperature of 839°C and boil at 1487°C.

Calcium was discovered by Davy in 1808 and is named 'Calcium' Latin word "calcis" meaning "lime".

Some common usages for Calcium: forms the bones and shells of lifeforms.

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

Calcium :: Ca :: 20 - Chemical Element. 10 Mar. 2010 <http://www.chemicalelement.com/element/calcium.html>.