Krypton

Krypton (pronounced /ˈkrɪptɒn/, KRIP-ton; from Greek: kryptos "hidden") is a chemical element with the symbol Kr and atomic number 36. It is a member of Group 18 and Period 4 elements. A colorless, odorless, tasteless noble gas, krypton occurs in trace amounts in the atmosphere, is isolated by fractionally distilling liquified air, and is often used with other rare gases in fluorescent lamps. Krypton is inert for most practical purposes. Krypton ... more

Chemical Element

The 36th Element in the Periodic Table

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Bromine

Bromine (pronounced /ˈbroʊmiːn/ BROH-meen or /ˈbroʊmɨn/ BROH-min, from Greek: βρῶμος, brómos, meaning "stench (of he-goats)" ), is a chemical element...

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Rubidium

Rubidium (pronounced /rʊˈbɪdiəm/, roo-BID-ee-əm) is a chemical element with the symbol Rb and atomic number 37. Rb is a soft, silvery-white metallic...

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Symbol:

  • Kr

Atomic mass:

Mass Uncertainty
  • 83.798 u (1.3915E-16 µg )
  • 0.002 u (3.32E-21 µg )

Electrons per shell:

  • 2,8,18,8

Electron affinity:

Electronegativity (Pauling scale):

  • 3

Atomic radius:

  • 88 pm (0.0000035 )

Covalent radius:

  • 1.1 pm (4.3E-8 )

Van der Waals radius:

  • 202 pm (0.00000795 )

Melting Point:

  • -157.15 °C (-250.87 °F )

Boiling Point:

  • -152.3 °C (-242.1 °F )

Periodic table block:

Ionization Energy:

  • 13.9996 eV (0.0000139996 MeV )

Discovery Date:

  • 1898

Discovering Country:

Electron Configuration:

  • Ar 3d10 4s2 4p6
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