Neptunium
Neptunium
0 posts
0 projects
Neptunium ΒΆ
AtomicNumber: 93
Element: Neptunium
Symbol: Np
AtomicMass: 237.0
NumberofNeutrons: 144
NumberofProtons: 93
NumberofElectrons: 93
Period: 7
Group: nan
Phase: artificial
Radioactive: yes
Natural: nan
Metal: yes
Nonmetal: nan
Metalloid: nan
Type: Actinide
AtomicRadius: nan
Electronegativity: 1.36
FirstIonization: 6.2657
Density: 20.5
MeltingPoint: 913.15
BoilingPoint: 4273.0
NumberOfIsotopes: 153.0
Discoverer: McMillan and Abelson
Year: 1940.0
SpecificHeat: nan
NumberofShells: 7
NumberofValence: nan