Potassium

Statistics:

• Name: Potassium
• Symbol: K
• Classification: Alkali Metals
• Atomic Number: 19
• Atomic Mass: 39.0983 g/mol
• Density: 0.86 g/cm³
• Melting: 63.7°C
• Boiling: 774°C
• Protons & Electrons:19
• Neutrons:20
• Discovered: 1807
• Discovered By: Davy
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Electrons Per Energy Level:

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

Isotopes:

Isotope: Half-life

• ³⁹K: stable
• ⁴⁰K: 1.277e+9 years
• ⁴¹K: stable
• ⁴²K: 12.360 hours
• ⁴³K: 22.3 hours

Brief Summary

Potassium is a Alkali Metals with the symbol 'K' and contains 19 Protons & Electrons with 20 neutrons in the nucleus of the atom. Potassium has an atomic mass of 39.0983 g/mol and, at a temperature of 20°C, has a density of 0.86 g/cm³. It will melt at a temperature of 63.7°C and boil at 774°C.

Potassium was discovered by Davy in 1807 and is named 'Potassium' potash.

Some common usages for Potassium: glass and soap products.

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

Potassium :: K :: 19 - Chemical Element. 10 Mar. 2010 <http://www.chemicalelement.com/element/potassium.html>.