Argon (Ar)vsOxygen (O)
Oxygen (O) has a higher Electron Affinity (141 vs -96 kJ/mol), while Argon (Ar) has a higher Atomic Mass (40 vs 16 u), while Argon (Ar) has a higher Atomic Number (18 vs 8).
Atomic Properties
18
Atomic Number
8
40
Atomic Mass
16
3
Period
2
18
Group
16
Physical Properties
2
Density
1
84
Melting Point
54
87
Boiling Point
90
N/A
Molar Heat Capacity
N/A
Chemical Properties
N/A
Electronegativity
3
-96
Electron Affinity
141
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Data sourced from Periodic-Table-JSON (CC-BY-SA (data is public domain scientific fact)).