Neptunium

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Neptunium

Neptunium es un elemento chimic de symbolo Np e numero atomic 93.

Nota
Nota
Factos in breve Iso., AN ...
UraniumNeptuniumPlutonium
Apparentia
Thumb
argentee metallic
Proprietates atomic
Nomine, symbolo, numero Neptunium, Np, 93
Serie chimic actinido
Gruppo, periodo, bloco 3, 7, f
Configuration electronic [Ra] 7s2 5f4 6d1
Electronegativitate 1,36
Proprietates physic
Stato solido
Massa molar (237) g·mol-1
Densitate 20,45 g·cm-3
Puncto de fusion 910 K, 637 °C, 1179 °F
Puncto de ebullition 4273 K, 4000 °C, 7232 °F
Calor de fusion 3,20 kJ·mol−1
Calor de vaporisation 336 kJ·mol-1
Calor specific 29,46 J·mol-1·K-1
Resistivitate electric (22 °C) 1220 nΩ·m
Conductivitate thermal 3,6 W·m-1·K-1
Isotopos
Iso.ANSemivitaMDED (MeV)PD
237Np syn. 2,144×106 a α 4,959 233Pa
FS
Valores in unitates SI e in le conditiones normal del material (25 °C, 100 kPa) si non indica al contrario.
Clauder

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