Argon (Ar)vsRadon (Rn)
Radon (Rn) has a higher Atomic Mass (222 vs 40 u), while Radon (Rn) has a higher Density (10 vs 2 g/cm³), while Radon (Rn) has a higher Atomic Number (86 vs 18).
Atomic Properties
18
Atomic Number
86
40
Atomic Mass
222
3
Period
6
18
Group
18
Physical Properties
2
Density
10
84
Melting Point
202
87
Boiling Point
212
N/A
Molar Heat Capacity
N/A
Chemical Properties
N/A
Electronegativity
2
-96
Electron Affinity
-68
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Data sourced from Periodic-Table-JSON (CC-BY-SA (data is public domain scientific fact)).