Arsenic (As)vsIodine (I)
Iodine (I) has a higher Electron Affinity (295 vs 78 kJ/mol), while Iodine (I) has a higher Atomic Mass (127 vs 75 u), while Iodine (I) has a higher Atomic Number (53 vs 33).
Atomic Properties
33
Atomic Number
53
75
Atomic Mass
127
4
Period
5
15
Group
17
Physical Properties
6
Density
5
N/A
Melting Point
387
N/A
Boiling Point
457
25
Molar Heat Capacity
N/A
Chemical Properties
2
Electronegativity
3
78
Electron Affinity
295
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Data sourced from Periodic-Table-JSON (CC-BY-SA (data is public domain scientific fact)).