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Krypton

36
Kr
83.80
Krypton
 General | States | Energies | Oxidation & Electrons | Appearance & Characteristics | Reactions | Other Forms Radius | Conductivity | Abundance

General:

Name: Krypton Symbol: Kr
Group: Noble Gas Atomic weight: 83.80
Density @ 293 K: 0.003708 g/cm3 Atomic volume: 38.9 cm3/mol
Group: Noble Gas discovered: 1898

States:

state (s, l, g): g
melting point: 116.6 K boiling point: 119.7 K
Heat of fusion: 1.638 kJ/mol Heat of vaporization: 9.029 kJ/mol

Energies:

1st ionization energy: 1350.7 kJ/mole
electronegativity: 3 2nd ionization energy: 2350.3 kJ/mole
electron affinity: kJ/mole 3rd ionization energy: 3565.1 kJ/mole
Specific heat: 0.248 J/gK heat atomization: 0 kJ/mole atoms

Oxidation & Electrons:

Shells: 2,8,18,8 electron configuration: [Ar] 3d10 4s2 4p6
minimum oxidation number: 0 maximum oxidation number: 2
min. common oxidation no.: 0 max. common oxidation no.: 2

Appearance & Characteristics:

structure: fcc: face-centered cubic color: colorless
uses: lamps, UV-laser toxicity: no
hardness: mohs characteristics: unreactive

Reactions:

reaction with air: none
reaction with 6M HCl: none reaction with 6M HCl: none
reaction with 15M HNO3: none reaction with 6M NaOH: none

Other Forms:

number of isotopes: 6 hydride(s): none
oxide(s): none chloride(s): none

Radius:

ionic radius (2- ion): pm ionic radius (1- ion): pm
atomic radius: 112 pm ionic radius (1+ ion): pm
ionic radius (2+ ion): pm ionic radius (3+ ion): pm

Conductivity:

thermal conductivity: 0.01 J/m-sec-deg
electrical conductivity: 0 1/mohm-cm polarizability: 2.5 A^3

Abundance:

source: Air
rel. abund. solar system: 1.653 log abundance earth's crust: -4 log
cost, pure: 33 $/100g cost, bulk: $/100g