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mineralogy elements Pm Promethium

Pm - Promethium - METAL LANTHANIDES

1080°
2730°
145
3
61
Pm
[Xe] 4f5 6s2
2
8
18
23
8
2
1.13
5.582
Synthetic
Radioactive
Liquid
Gaseous
Promethium Electronic configuration diagram
Electronic configuration diagram

Name Promethium
Number 61
Atomic 145
Symbol Pm
Fusion 1080
Boiling 2730
Density 7.26
Period 6
Group 0
Discovery 1945 Marinsky et al.
Abundance 0.001
Radius 2.6
Electronegativity 1.13
Ionization 5.582
Number of isotopes 14
Electronic configuration [Xe] 4f5 6s2
Oxidation states 3
Electron by energy level 2,8,18,23,8,2