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Erbium (Er)vsFermium (Fm)

Fermium (Fm) has a higher Atomic Mass (257 vs 167 u), while Fermium (Fm) has a higher Atomic Number (100 vs 68), while Fermium (Fm) has a higher Period (7 vs 6).

Atomic Properties

68
Atomic Number
100
167
Atomic Mass
257
6
Period
7
3
Group
3

Physical Properties

9
Density
N/A
1,802
Melting Point
1,800
3,141
Boiling Point
N/A
28
Molar Heat Capacity
N/A

Chemical Properties

1
Electronegativity
1
30
Electron Affinity
34

Similar Comparisons to Erbium (Er) vs Fermium (Fm)

Data sourced from Periodic-Table-JSON (CC-BY-SA (data is public domain scientific fact)).