Actinium (Ac)vsIron (Fe)
Actinium (Ac) has a higher Atomic Mass (227 vs 56 u), while Actinium (Ac) has a higher Atomic Number (89 vs 26), while Iron (Fe) has a higher Group (8 vs 3).
Atomic Properties
89
Atomic Number
26
227
Atomic Mass
56
7
Period
4
3
Group
8
Physical Properties
10
Density
8
1,500
Melting Point
1,811
3,500
Boiling Point
3,134
27
Molar Heat Capacity
25
Chemical Properties
1
Electronegativity
2
34
Electron Affinity
15
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Data sourced from Periodic-Table-JSON (CC-BY-SA (data is public domain scientific fact)).