Np

Neptunium

Z 93 237.0 g/molActinide Radioactive

Overview Atomic Properties Thermodynamics Electromagnetism Isotopes

Phase

Temperature

273.2 K(0.0 °C32.0 °F)

Density (STP)

20.45 g/cm³

Current Phase

Solid

Melting Point

912.0 K (638.9 °C1,181.9 °F)

Boiling Point

4,447.0 K (4,173.9 °C7,544.9 °F)

Heating Curve

Added Heat

0.0kJ/moleV

Current Phase

Solid

Temperature

0.0 K(-273.1 °C-459.7 °F)

Heat of Fusion

5.19 kJ/mol0.0538 eV

Heat of Vaporization

336.0 kJ/mol3.4824 eV

Specific Heat

0.1243 J/(g·K)

Thermal Conductivity

6.3 W/(m·K)