Chemical Element: Neptunium
Properties:
Periodic Number: 93
Symbol: Np
Name: Neptunium
Average Mass: 237 g/mol
Stable: no
Density: 20.2
Boiling Point: ?
Melting Point: 644.0°C
Specific Heat: ?
Ionisation Potential: 6.3 eV
93
Np
237
Isotopes:
Name Neutrons Mass Abundance Spin Stable Half Life
244Np 151 244.06785 0 - no -
238Np 145 238.0509405 0 - no -
225Np 132 225.0339 0 - no -
226Np 133 226.03513 0 - no -
231Np 138 231.03823 0 - no -
227Np 134 227.03496 0 - no -
241Np 148 241.05825 0 - no -
228Np 135 228.03618 0 - no -
233Np 140 233.04073 0 - no -
240Np 147 240.056169 0 - no -
234Np 141 234.042889 0 - no -
232Np 139 232.0401 0 - no -
235Np 142 235.0440559 0 - no -
239Np 146 239.0529314 0 - no -
242Np 149 242.06164 0 - no -
230Np 137 230.03781 0 - no -
237Np 144 237.0481673 0 - no -
229Np 136 229.03625 0 - no -
243Np 150 243.06427 0 - no -
236Np 143 236.04656 0 - no -