Actinium (Ac)vsAntimony (Sb)
Antimony (Sb) has a higher Group (15 vs 3), while Antimony (Sb) has a higher Electron Affinity (101 vs 34 kJ/mol), while Actinium (Ac) has a higher Atomic Mass (227 vs 122 u).
Atomic Properties
89
Atomic Number
51
227
Atomic Mass
122
7
Period
5
3
Group
15
Physical Properties
10
Density
7
1,500
Melting Point
904
3,500
Boiling Point
1,908
27
Molar Heat Capacity
25
Chemical Properties
1
Electronegativity
2
34
Electron Affinity
101
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Data sourced from Periodic-Table-JSON (CC-BY-SA (data is public domain scientific fact)).