Neptunium

Element information

Atomic properties

Mass: 237.04817 u

Electron configuration: [Rn]7s2 5f4 6d1

Oxidation states: +6, +5, +4, +3

Electronegativity: 1.36

Physical properties

Density: 20.25 g/cm³

Standard state: solid

Melting point: 917 K

Boiling point: 4175 K

₉₃Np

Part of the Periodic Table 2 collection

Other artworks