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)

Pressure

101,325 Pa(1 atm1.013 bar760 mmHg)

Density (STP)

20.2 g/cm³

Current Phase

Solid

Melting Point

917.0 K (643.9 °C1,190.9 °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

3.2 kJ/mol0.0332 eV

Heat of Vaporization

336.0 kJ/mol3.4824 eV

Specific Heat

0.1243 J/(g·K)

Thermal Conductivity

6.3 W/(m·K)