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Krypton Element Properties, Noble Gas Group, Periodic Table of the Elements

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Krypton

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Krypton Element Properties

p35
Br
Bromine
p36
Kr
Krypton
s37
Rb
Rubidium
General
NameKrypton
SymbolKr
Number36
Group Number18
GroupNoble Gas
Blockp
Density0.003708 g/cm3
Atomic Weight83.80 g/mol
Atomic Volume38.9 cm3/mol
Discover1898


States
StateGas
Melting Point115.79 K
Boiling Point119.93 K
Triple Point115.775 K
Critical Point209.41 K
Heat of Fusion1.64 kJ/mol
Heat of Vaporization9.08 kJ/mol


Energies
First Ionization Energy1350.7 kJ/mole
Second Ionization Energy2350.3 kJ/mole
Third Ionization Energy3565.1 kJ/mole
Electronegativity3
Electron AffinityNil
Specific Heat0.248 J/gK
Heat Atomization0 kJ/mole atoms


Oxidation and Electrons
Shells2,8,18,8
Electron Configuration[Ar] 3d10 4s2 4p6
Minimum Oxidation Number0
Maximum Oxidation Number2
Minimum Common Oxidation Number0
Maximum Common Oxidation Number2


Appearance and Characteristics
Crystal Structurecubic face centered
Characteristicsunreactive
Colorcolorless
Useslamps, UV-laser
Hardnessmohs
ToxicityNo


Reactions
Reaction with AirNone
Reaction with 6M HClNone
Reaction with 15M HNO3None
Reaction with 6M NaOHNone


Other Forms
Number of Isotopes6
HydrideNone
OxideNone
ChlorideNone


Radius
Atomic Radius112 pm
Ionic Radius (1+ ion)Nil
Ionic Radius (1- ion)Nil
Ionic Radius (2+ ion)Nil
Ionic Radius (2- ion)Nil
Ionic Radius (3+ ion)Nil


Conductivity
Thermal Conductivity0.01 J/m-sec-deg
Electrical Conductivity0 1/mohm-cm
Polarizability2.5 A3


Abundance
SourceAir
Relation Abundance Solar System1.653 log
Abundance Earth's Crust-4 log


p35
Br
Bromine
p36
Kr
Krypton
s37
Rb
Rubidium




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