Americium (Am)vsCopper (Cu)
Copper (Cu) has a higher Electron Affinity (119 vs 10 kJ/mol), while Americium (Am) has a higher Atomic Mass (243 vs 64 u), while Copper (Cu) has a higher Group (11 vs 3).
Atomic Properties
95
Atomic Number
29
243
Atomic Mass
64
7
Period
4
3
Group
11
Physical Properties
12
Density
9
1,449
Melting Point
1,358
2,880
Boiling Point
2,835
63
Molar Heat Capacity
24
Chemical Properties
1
Electronegativity
2
10
Electron Affinity
119
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Data sourced from Periodic-Table-JSON (CC-BY-SA (data is public domain scientific fact)).