Iridium (Ir)vsRoentgenium (Rg)
Roentgenium (Rg) has a higher Atomic Mass (282 vs 192 u), while Roentgenium (Rg) has a higher Atomic Number (111 vs 77), while Roentgenium (Rg) has a higher Density (29 vs 23 g/cm³).
Atomic Properties
77
Atomic Number
111
192
Atomic Mass
282
6
Period
7
9
Group
11
Physical Properties
23
Density
29
2,719
Melting Point
N/A
4,403
Boiling Point
N/A
25
Molar Heat Capacity
N/A
Chemical Properties
2
Electronegativity
N/A
151
Electron Affinity
151
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Data sourced from Periodic-Table-JSON (CC-BY-SA (data is public domain scientific fact)).