Erbium (Er)vsMendelevium (Md)
Mendelevium (Md) has a higher Electron Affinity (94 vs 30 kJ/mol), while Erbium (Er) has a higher Melting Point (1,802 vs 1,100 K), while Mendelevium (Md) has a higher Atomic Mass (258 vs 167 u).
Atomic Properties
68
Atomic Number
101
167
Atomic Mass
258
6
Period
7
3
Group
3
Physical Properties
9
Density
N/A
1,802
Melting Point
1,100
3,141
Boiling Point
N/A
28
Molar Heat Capacity
N/A
Chemical Properties
1
Electronegativity
1
30
Electron Affinity
94
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Data sourced from Periodic-Table-JSON (CC-BY-SA (data is public domain scientific fact)).