Chemicool
Kr
36
83.80
Krypton
General
|
States
|
Energies
|
Oxidation & Electrons
|
Appearance & Characteristics
Reactions
|
Other Forms
|
Radius
|
Conductivity
|
Abundance
Encyclopedia Britannica articles
General
Name
Krypton
Symbol
Kr
atomic number
36
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
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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
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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
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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
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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
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