Erbium (Er)vsHelium (He)
Erbium (Er) has a higher Electron Affinity (30 vs -48 kJ/mol), while Erbium (Er) has a higher Melting Point (1,802 vs 1 K), while Erbium (Er) has a higher Boiling Point (3,141 vs 4 K).
Atomic Properties
68
Atomic Number
2
167
Atomic Mass
4
6
Period
1
3
Group
18
Physical Properties
9
Density
0
1,802
Melting Point
1
3,141
Boiling Point
4
28
Molar Heat Capacity
N/A
Chemical Properties
1
Electronegativity
N/A
30
Electron Affinity
-48
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Data sourced from Periodic-Table-JSON (CC-BY-SA (data is public domain scientific fact)).