Neptunium — Np
The chemical element Neptunium is an element of type Metal actinides with the symbol Np. It has an atomic mass of 237 u and an electronic configuration of [Rn] 5f4 6d1 7s2.
Synthétique
Radioactif
Liquide
Gaz
3902°
4
5
6
7
8
18
32
22
9
2
- Atomic number
- 93
- Atomic mass
- 237
- Symbol
- Np
- Melting point
- 640
- Boiling point
- 3902
- Density
- 20.45
- Period
- 7
- Group
- 0
- Discovery
- 1940 McMillan and Abelson
- Abundance
- 0.001
- Radius
- 0
- Electronegativity
- 1.36
- Ionization
- 6.2657
- Isotope
- 153
- Electronic configuration
- [Rn] 5f4 6d1 7s2
- Oxidation state
- 3,4,5,6,7
- Electron
- 2,8,18,32,22,9,2