Iron (Fe)vsNeptunium (Np)
Neptunium (Np) has a higher Atomic Mass (237 vs 56 u), while Neptunium (Np) has a higher Atomic Number (93 vs 26), while Neptunium (Np) has a higher Electron Affinity (46 vs 15 kJ/mol).
Atomic Properties
26
Atomic Number
93
56
Atomic Mass
237
4
Period
7
8
Group
3
Physical Properties
8
Density
20
1,811
Melting Point
912
3,134
Boiling Point
4,447
25
Molar Heat Capacity
29
Chemical Properties
2
Electronegativity
1
15
Electron Affinity
46
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Data sourced from Periodic-Table-JSON (CC-BY-SA (data is public domain scientific fact)).