Americium (Am)vsCobalt (Co)
Cobalt (Co) has a higher Electron Affinity (64 vs 10 kJ/mol), while Americium (Am) has a higher Atomic Mass (243 vs 59 u), while Americium (Am) has a higher Atomic Number (95 vs 27).
Atomic Properties
95
Atomic Number
27
243
Atomic Mass
59
7
Period
4
3
Group
9
Physical Properties
12
Density
9
1,449
Melting Point
1,768
2,880
Boiling Point
3,200
63
Molar Heat Capacity
25
Chemical Properties
1
Electronegativity
2
10
Electron Affinity
64
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Data sourced from Periodic-Table-JSON (CC-BY-SA (data is public domain scientific fact)).