Nickel (Ni)vsPromethium (Pm)
Nickel (Ni) has a higher Electron Affinity (112 vs 12 kJ/mol), while Nickel (Ni) has a higher Group (10 vs 3), while Promethium (Pm) has a higher Atomic Mass (145 vs 59 u).
Atomic Properties
28
Atomic Number
61
59
Atomic Mass
145
4
Period
6
10
Group
3
Physical Properties
9
Density
7
1,728
Melting Point
1,315
3,003
Boiling Point
3,273
26
Molar Heat Capacity
N/A
Chemical Properties
2
Electronegativity
1
112
Electron Affinity
12
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Data sourced from Periodic-Table-JSON (CC-BY-SA (data is public domain scientific fact)).