Erbium (Er)vsMagnesium (Mg)
Erbium (Er) has a higher Electron Affinity (30 vs -40 kJ/mol), while Erbium (Er) has a higher Atomic Mass (167 vs 24 u), while Erbium (Er) has a higher Atomic Number (68 vs 12).
Atomic Properties
68
Atomic Number
12
167
Atomic Mass
24
6
Period
3
3
Group
2
Physical Properties
9
Density
2
1,802
Melting Point
923
3,141
Boiling Point
1,363
28
Molar Heat Capacity
25
Chemical Properties
1
Electronegativity
1
30
Electron Affinity
-40
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Data sourced from Periodic-Table-JSON (CC-BY-SA (data is public domain scientific fact)).