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Neptunium
Atomic class Actinide  +
Atomic mass 237  +
Atomic number 93  +
Atomic symbol Np  +
Boiling point 4,273.15 K (4,000 °C, 7,232 °F, 7,691.67 °R)  +
Density 20.25 +
Melting point 913.15 K (640 °C, 1,184 °F, 1,643.67 °R)  +
Categories Elements  +
Modification dateThis property is a special property in this wiki. 29 March 2009 18:33:45  +
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