|
Symbol
|
Kr
|
|
Atomic
Number
|
36
|
Relative
Atomic
Mass
12C
=
12.0000
|
83.798
(±2)
[Since
2001]
|
|
Atomic
Radius
pm
|
110
|
First
Ionisation
Energy
kJ
mol
-1
|
1350.7
|
|
First
Ionisation
Energy
(eV)
|
13.9996
|
|
Electronegativity
|
-
|
Density
kg
m
-3
|
2823
[s.,
m.p.]
2413
[l.,
b.p.]
3.7493
[g.,
273
K]
|
|
Molar
Volume
cm
3
|
29.68
[116
K]
|
Thermal
Conductivity
W
m
-1
K
-1
|
0.00949
[300
K]
|
|
Melting
Point
K
|
116.6
|
|
Boiling
Point
K
|
120.85
|
|
Number
of
Isotopes
|
27
|
|
Isotope
Atomic
mass/u
Mole
fraction
|
78Kr
77.920
388(7)
0.003
55(3)
80Kr
79.916
379(4)
0.022
86(10)
82Kr
81.913
4850(28)
0.115
93(31)
83Kr
82.914
137(4)
0.115
00(19)
84Kr
83.911
508(3)
0.569
87(15)
86Kr
85.910
615(5)
0.172
79(41)
|
|
Inner
+
outer
Shells
|
|
|
Inner
+
outer
Orbitals
|
|
|
Filling
Orbital
|
|
Ground
State
Electron
Configuration
|
|
[Ar]
|
3d
10
|
4s
2
|
4p
6
|
=
[Kr]
|
|
Ground
State
Electron
Configuration
with
free
Orbitals (n=
0)
|
|
Ground
State
Electron
Configuration
with
compressed
Orbitals (n=24)
|
|
|
|
|
Singularity
|
|
|
|
|
|
s
|
p
|
d
|
f
|
g
|
h
|
i
|
j
|
|
1
|
2
|
|
|
|
|
|
|
|
|
2
|
2
|
6
|
|
|
|
|
|
|
|
3
|
2
|
6
|
10
|
|
|
|
|
|
|
4
|
2
|
6
|
10
|
14
|
|
|
|
|
|
5
|
|
|
|
|
|
|
|
|
|
6
|
|
|
|
|
|
|
|
|
|
7
|
|
|
|
|
|
|
|
|
|
|
|
|
Term
Symbol
|
1S
0
|
|
Discovery
|
It
was
discovered
in
liquefied
atmospheric
air
by
the
Scottish
chemist
William
Ramsay
and
the
English
chemist
Morris
William
Travers
(London,
England)
in
1898.
A
wavelength
in
the
atomic
spectrum
of
86Kr
is
the
fundamental
standard
of
length.
|
|
Name
Derived
From
|
The
name
derives
from
the
Greek
kryptos
for
"concealed"
or
"hidden".
|
![[Picture]](../images/aglarule.gif){kind=small}
