Neptunium (Np)vsPraseodymium (Pr)
Neptunium (Np) has a higher Density (20 vs 7 g/cm³), while Praseodymium (Pr) has a higher Electron Affinity (93 vs 46 kJ/mol), while Neptunium (Np) has a higher Atomic Mass (237 vs 141 u).
Atomic Properties
93
Atomic Number
59
237
Atomic Mass
141
7
Period
6
3
Group
3
Physical Properties
20
Density
7
912
Melting Point
1,208
4,447
Boiling Point
3,403
29
Molar Heat Capacity
27
Chemical Properties
1
Electronegativity
1
46
Electron Affinity
93
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Data sourced from Periodic-Table-JSON (CC-BY-SA (data is public domain scientific fact)).