Actinium (Ac)vsSamarium (Sm)
Actinium (Ac) has a higher Electron Affinity (34 vs 16 kJ/mol), while Actinium (Ac) has a higher Boiling Point (3,500 vs 2,173 K), while Actinium (Ac) has a higher Atomic Mass (227 vs 150 u).
Atomic Properties
89
Atomic Number
62
227
Atomic Mass
150
7
Period
6
3
Group
3
Physical Properties
10
Density
8
1,500
Melting Point
1,345
3,500
Boiling Point
2,173
27
Molar Heat Capacity
30
Chemical Properties
1
Electronegativity
1
34
Electron Affinity
16
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Data sourced from Periodic-Table-JSON (CC-BY-SA (data is public domain scientific fact)).