| Atomic Number: |
93
|
| Atomic Symbol: |
Np
|
| Atomic Weight: |
237.0482
|
| Electron Configuration: |
[Rn]7s25f46d1
|
Neptunium
is a radioactive rare earth metal and has at least 3 allotropic
forms. It is named for the planet Neptune. Np-237 is a
by-product from nuclear reactors.