Periodic Table · element
Promethium
Pm · Z 61
- atomic number
- 61
- atomic mass
- 145
- notation
- Pm
- group
- f-block: Lanthanide
- period
- 6
- state0c
- Solid
- state20c
- Solid
- occurrence
- From Decay
- density
- 7.26
- melting pt
- 1142
- boiling pt
- 3000
- discovered
- 1942
- abundance
- 2e-19
categories
#Lanthanide#Metal
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