Periodic Table · element
Neptunium
Np · Z 93
- atomic number
- 93
- atomic mass
- 237
- notation
- Np
- group
- f-block: Actinide
- period
- 7
- state0c
- Solid
- state20c
- Solid
- occurrence
- From Decay
- density
- 20.45
- melting pt
- 640
- boiling pt
- 4000
- discovered
- 1940
- abundance
- 3e-12
categories
#Actinide#Metal
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