Calcium (Ca)vsRoentgenium (Rg)
Roentgenium (Rg) has a higher Electron Affinity (151 vs 2 kJ/mol), while Roentgenium (Rg) has a higher Density (29 vs 2 g/cm³), while Roentgenium (Rg) has a higher Atomic Mass (282 vs 40 u).
Atomic Properties
20
Atomic Number
111
40
Atomic Mass
282
4
Period
7
2
Group
11
Physical Properties
2
Density
29
1,115
Melting Point
N/A
1,757
Boiling Point
N/A
26
Molar Heat Capacity
N/A
Chemical Properties
1
Electronegativity
N/A
2
Electron Affinity
151
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Data sourced from Periodic-Table-JSON (CC-BY-SA (data is public domain scientific fact)).