Actinium (Ac)vsCopper (Cu)
Copper (Cu) has a higher Group (11 vs 3), while Actinium (Ac) has a higher Atomic Mass (227 vs 64 u), while Copper (Cu) has a higher Electron Affinity (119 vs 34 kJ/mol).
Atomic Properties
89
Atomic Number
29
227
Atomic Mass
64
7
Period
4
3
Group
11
Physical Properties
10
Density
9
1,500
Melting Point
1,358
3,500
Boiling Point
2,835
27
Molar Heat Capacity
24
Chemical Properties
1
Electronegativity
2
34
Electron Affinity
119
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Data sourced from Periodic-Table-JSON (CC-BY-SA (data is public domain scientific fact)).