General: |
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Name: Krypton
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Symbol: Kr
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Group: Noble Gas
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Atomic weight: 83.80
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Density @ 293 K: 0.003708 g/cm3
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Atomic volume: 38.9 cm3/mol
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Group: Noble Gas
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discovered: 1898
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States: |
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state (s, l, g): g
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melting point: 116.6 K
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boiling point: 119.7 K
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Heat of fusion: 1.638 kJ/mol
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Heat of vaporization: 9.029 kJ/mol
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Energies: |
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1st ionization energy: 1350.7 kJ/mole
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electronegativity: 3
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2nd ionization energy: 2350.3 kJ/mole
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electron affinity: kJ/mole
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3rd ionization energy: 3565.1 kJ/mole
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Specific heat: 0.248 J/gK
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heat atomization: 0 kJ/mole atoms
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Oxidation & Electrons: |
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Shells: 2,8,18,8
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electron configuration: [Ar] 3d10 4s2 4p6
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minimum oxidation number: 0
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maximum oxidation number: 2
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min. common oxidation no.: 0
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max. common oxidation no.: 2
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Appearance & Characteristics: |
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structure: fcc: face-centered cubic
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color: colorless
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uses: lamps, UV-laser
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toxicity: no
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hardness: mohs
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characteristics: unreactive
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Reactions: |
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reaction with air: none
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reaction with 6M HCl: none
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reaction with 6M HCl: none
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reaction with 15M HNO3: none
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reaction with 6M NaOH: none
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Other Forms: |
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number of isotopes: 6
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hydride(s): none
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oxide(s): none
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chloride(s): none
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Radius: |
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ionic radius (2- ion): pm
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ionic radius (1- ion): pm
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atomic radius: 112 pm
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ionic radius (1+ ion): pm
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ionic radius (2+ ion): pm
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ionic radius (3+ ion): pm
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Conductivity: |
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thermal conductivity: 0.01 J/m-sec-deg
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electrical conductivity: 0 1/mohm-cm
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polarizability: 2.5 A^3
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Abundance: |
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source: Air
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rel. abund. solar system: 1.653 log
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abundance earth's crust: -4 log
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cost, pure: 33 $/100g
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cost, bulk: $/100g
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