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Potassium at Chemical Elements.com
Basic Information | Atomic Structure | Isotopes | Related Links | Citing This Page

Basic Information

Name: Potassium
Symbol: K
Atomic Number: 19
Atomic Mass: 39.0983 amu
Melting Point: 63.65 °C (336.8 K, 146.57 °F)
Boiling Point: 774.0 °C (1047.15 K, 1425.2 °F)
Number of Protons/Electrons: 19
Number of Neutrons: 20
Classification: Alkali Metal
Crystal Structure: Cubic
Density @ 293 K: 0.862 g/cm3
Color: silvery

Atomic Structure

[Bohr Model of Potassium]  
Number of Energy Levels: 4

    First Energy Level: 2
    Second Energy Level: 8
    Third Energy Level: 8
    Fourth Energy Level: 1


Isotope Half Life
K-401.28E9 years
K-4212.4 hours
K-4322.3 hours


Date of Discovery: 1807
Discoverer: Sir Humphrey Davy
Name Origin: potash
Symbol Origin: From the Latin word kalium
Uses: glass, soap
Obtained From: minerals (carnallite)

Related Links

Note: The external links below are not a part of this site and their content is not the responsibility of this site
  1. Healthworld Online - Potassium
    • Contains an "Introduction to Tungsten", among other things
If you know of any other links for Potassium, please let me know

MLA Format for Citing This Page

Bentor, Yinon. Chemical Element.com - Potassium. <http://www.chemicalelements.com/elements/k.html>.

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