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Copper (Cu)vsPromethium (Pm)

Copper (Cu) has a higher Electron Affinity (119 vs 12 kJ/mol), while Copper (Cu) has a higher Group (11 vs 3), while Promethium (Pm) has a higher Atomic Mass (145 vs 64 u).

Atomic Properties

29
Atomic Number
61
64
Atomic Mass
145
4
Period
6
11
Group
3

Physical Properties

9
Density
7
1,358
Melting Point
1,315
2,835
Boiling Point
3,273
24
Molar Heat Capacity
N/A

Chemical Properties

2
Electronegativity
1
119
Electron Affinity
12

Similar Comparisons to Copper (Cu) vs Promethium (Pm)

Data sourced from Periodic-Table-JSON (CC-BY-SA (data is public domain scientific fact)).