Americium (Am)vsArsenic (As)
Arsenic (As) has a higher Electron Affinity (78 vs 10 kJ/mol), while Arsenic (As) has a higher Group (15 vs 3), while Americium (Am) has a higher Atomic Mass (243 vs 75 u).
Atomic Properties
95
Atomic Number
33
243
Atomic Mass
75
7
Period
4
3
Group
15
Physical Properties
12
Density
6
1,449
Melting Point
N/A
2,880
Boiling Point
N/A
63
Molar Heat Capacity
25
Chemical Properties
1
Electronegativity
2
10
Electron Affinity
78
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Data sourced from Periodic-Table-JSON (CC-BY-SA (data is public domain scientific fact)).