Antimony (Sb)vsMendelevium (Md)
Antimony (Sb) has a higher Group (15 vs 3), while Mendelevium (Md) has a higher Atomic Mass (258 vs 122 u), while Mendelevium (Md) has a higher Atomic Number (101 vs 51).
Atomic Properties
51
Atomic Number
101
122
Atomic Mass
258
5
Period
7
15
Group
3
Physical Properties
7
Density
N/A
904
Melting Point
1,100
1,908
Boiling Point
N/A
25
Molar Heat Capacity
N/A
Chemical Properties
2
Electronegativity
1
101
Electron Affinity
94
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Data sourced from Periodic-Table-JSON (CC-BY-SA (data is public domain scientific fact)).