Promethium (Pm)
Atomic Data for Promethium (Pm)
Atomic Number = 61
Atomic Weight = 145
Reference
E95
Isotope
Mass
Abundance
Spin
Mag Moment
145
Pm
144.912743
0
5/2
146
Pm
145.914708
0
3
147
Pm
146.915135
0
7/2
+2.7
149
Pm
148.918332
0
7/2
±3.3
151
Pm
150.921203
0
5/2
±1.8
Pm I Ground State (1
s
2
2
s
2
2
p
6
3
s
2
3
p
6
3
d
1
0
4
s
2
4
p
6
4
d
1
0
5
s
2
5
p
6
)4
f
5
6
s
2
6
H°
5
/
2
Ionization energy 45020 cm
-1
(5.582 eV) Ref.
WSPC78
Pm II Ground State (1
s
2
2
s
2
2
p
6
3
s
2
3
p
6
3
d
1
0
4
s
2
4
p
6
4
d
1
0
5
s
2
5
p
6
)4
f
5
6
s
7
H°
2
Ionization energy 87900 cm
-1
(10.90 eV) Ref.
SR65
