Beryllium (Be)vsLanthanum (La)
Lanthanum (La) has a higher Electron Affinity (53 vs -48 kJ/mol), while Lanthanum (La) has a higher Atomic Mass (139 vs 9 u), while Lanthanum (La) has a higher Atomic Number (57 vs 4).
Atomic Properties
4
Atomic Number
57
9
Atomic Mass
139
2
Period
6
2
Group
3
Physical Properties
2
Density
6
1,560
Melting Point
1,193
2,742
Boiling Point
3,737
16
Molar Heat Capacity
27
Chemical Properties
2
Electronegativity
1
-48
Electron Affinity
53
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Data sourced from Periodic-Table-JSON (CC-BY-SA (data is public domain scientific fact)).