Radium (Ra)vsSamarium (Sm)
Samarium (Sm) has a higher Electron Affinity (16 vs 10 kJ/mol), while Radium (Ra) has a higher Atomic Mass (226 vs 150 u), while Samarium (Sm) has a higher Group (3 vs 2).
Atomic Properties
88
Atomic Number
62
226
Atomic Mass
150
7
Period
6
2
Group
3
Physical Properties
6
Density
8
1,233
Melting Point
1,345
2,010
Boiling Point
2,173
N/A
Molar Heat Capacity
30
Chemical Properties
1
Electronegativity
1
10
Electron Affinity
16
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Data sourced from Periodic-Table-JSON (CC-BY-SA (data is public domain scientific fact)).