Actinium (Ac)vsAmericium (Am)
Actinium (Ac) has a higher Electron Affinity (34 vs 10 kJ/mol), while Americium (Am) has a higher Molar Heat Capacity (63 vs 27 J/(mol·K)), while Actinium (Ac) has a higher Boiling Point (3,500 vs 2,880 K).
Atomic Properties
89
Atomic Number
95
227
Atomic Mass
243
7
Period
7
3
Group
3
Physical Properties
10
Density
12
1,500
Melting Point
1,449
3,500
Boiling Point
2,880
27
Molar Heat Capacity
63
Chemical Properties
1
Electronegativity
1
34
Electron Affinity
10
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Data sourced from Periodic-Table-JSON (CC-BY-SA (data is public domain scientific fact)).