|
Americium
|
Symbol
|
Am
|
|
Atomic
Number
|
95
|
Relative
Atomic
Mass
12C
=
12.0000
|
[
243
]
243.0614
7.37(2)x103
year
|
|
Significant
Atomic
Mass
|
243
Neutrons
148
|
|
Atomic
Radius
pm
|
173
|
First
Ionisation
Energy
kJ
mol
-1
|
578.2
|
|
Electronegativity
|
1.3
|
|
Density
kg
m
-3
|
13670
[293
K]
|
|
Molar
Volume
cm
3
|
17.78
|
Thermal
Conductivity
W
m
-1
K
-1
|
10
[300
K]
(est.)
|
|
Melting
Point
K
|
1445
|
|
Boiling
Point
K
|
2880
|
|
Number
of
Isotopes
|
23
|
|
Inner + outer
Shells
|
|
|
Inner + outer
Orbitals
|
|
|
Filling
Orbital
|
|
|
Ground
State
Electron
Configuration
|
|
|
|
Ground
State
Electron
Configuration with
free Orbitals (n= 23
)
|
|
|
|
|
Ground
State
Electron
Configuration
with
compressed
Orbitals
(n=162
)
|
|
|
|
|
Singularity
|
|
|
|
|
|
s
|
p
|
d
|
f
|
g
|
h
|
i
|
j
|
|
1
|
2
|
|
|
|
|
|
|
|
|
2
|
2
|
6
|
|
|
|
|
|
|
|
3
|
2
|
6
|
10
|
|
|
|
|
|
|
4
|
2
|
6
|
10
|
14
|
|
|
|
|
|
5
|
2
|
6
|
10
|
7
|
7
|
18
|
|
|
|
|
6
|
2
|
6
|
10
|
14
|
18
|
22
|
|
|
|
7
|
2
|
6
|
10
|
14
|
18
|
22
|
26
|
|
|
8
|
|
|
|
|
|
|
|
|
|
|
|
|
Term
Symbol
|
8S
7/2
|
|
Discovery
|
Discovered
by
G.T.
Seaborg,
R.A.
James,
L.O.
Morgan
and
A.
Ghiorso
(Chicago,
USA)
in
1944
|
|
Name
Derived
From
|
English
America
|
|