Cerium (Ce)vsMendelevium (Md)
Mendelevium (Md) has a higher Atomic Mass (258 vs 140 u), while Mendelevium (Md) has a higher Atomic Number (101 vs 58), while Mendelevium (Md) has a higher Electron Affinity (94 vs 55 kJ/mol).
Atomic Properties
58
Atomic Number
101
140
Atomic Mass
258
6
Period
7
3
Group
3
Physical Properties
7
Density
N/A
1,068
Melting Point
1,100
3,716
Boiling Point
N/A
27
Molar Heat Capacity
N/A
Chemical Properties
1
Electronegativity
1
55
Electron Affinity
94
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Data sourced from Periodic-Table-JSON (CC-BY-SA (data is public domain scientific fact)).