Barium (Ba)vsMendelevium (Md)
Mendelevium (Md) has a higher Electron Affinity (94 vs 14 kJ/mol), while Mendelevium (Md) has a higher Atomic Mass (258 vs 137 u), while Mendelevium (Md) has a higher Atomic Number (101 vs 56).
Atomic Properties
56
Atomic Number
101
137
Atomic Mass
258
6
Period
7
2
Group
3
Physical Properties
4
Density
N/A
1,000
Melting Point
1,100
2,118
Boiling Point
N/A
28
Molar Heat Capacity
N/A
Chemical Properties
1
Electronegativity
1
14
Electron Affinity
94
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Data sourced from Periodic-Table-JSON (CC-BY-SA (data is public domain scientific fact)).