#36
Kr
Krypton
83.798 u

Krypton

Noble Gas
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Properties

Symbol Kr
Atomic Number 36
Atomic Mass 83.798
Protons 36
Neutrons 48
Electrons 36
Type Noble Gas
Isotopes Krypton-78, Krypton-80, Krypton-82, Krypton-83, Krypton-84
Discovery Year 1898
Discovered By William Ramsay, Morris Travers
Group 18
Period 4
Boiling Point -157.36°F
Melting Point -244.11°F
Electron Configuration [Ar] 3d¹⁰ 4s² 4p⁶
Density (g/cm³) 3.733
Crystal Structure Face-centered cubic
Magnetism Diamagnetic
Abundance in Earth's Crust 0.0001%
Phase at Room Temperature Gas
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