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

Basic Information

Name: Krypton
Symbol: Kr
Atomic Number: 36
Atomic Mass: 83.8 amu
Melting Point: -157.2 °C (115.950005 K, -250.95999 °F)
Boiling Point: -153.4 °C (119.75001 K, -244.12 °F)
Number of Protons/Electrons: 36
Number of Neutrons: 48
Classification: Noble Gas
Crystal Structure: Cubic
Density @ 293 K: 3.74 g/cm3
Color: colorless gas

Atomic Structure

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

    First Energy Level: 2
    Second Energy Level: 8
    Third Energy Level: 18
    Fourth Energy Level: 8


Isotope Half Life
Kr-791.45 days
Kr-81210000.0 years
Kr-83m1.86 hours
Kr-8510.73 years
Kr-85m4.48 hours
Kr-871.27 hours
Kr-882.84 hours
Kr-893.15 minutes
Kr-9032.3 seconds


Date of Discovery: 1898
Discoverer: Sir William Ramsay
Name Origin: From the Greek word kryptos (hidden)
Uses: Lighting
Obtained From: production of liquid air

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MLA Format for Citing This Page

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