Do you see an error on this page? Please create an account and help us edit this page. Your help is greatly appreciated.
|Melting Point ( °C )||912±3 K (639±3 °C, 1182±5 °F)|
|Boiling Point ( °C )||4447 K (4174 °C, 7545 °F)|
|Density (g/cm3)||alpha: 20.45 g·cm−3 (at 0 °C, 101.325 kPa)
accepted standard value: 19.38 g·cm−3
|Earth crust (%)|
|Group||N/A, F Block|
|Electron configuration||Rn 5f4 6d1 7s2|
|Ionization energy (eV)||1st: 604.5 kJ·mol−1|
Neptunium is a chemical element that has a atomic nuber of 93 and a estimated weight of 237. It is A radioactive actinide metal and has a Silvery and metallic look. Neptunium was discovered in 1940 by Edwin McMillan and Philip H. Abelson at the Berkeley Radiation Laboratory in 1940. This element is located in the F block and has no Group.