Americium (Am)vsSelenium (Se)
Selenium (Se) has a higher Electron Affinity (195 vs 10 kJ/mol), while Selenium (Se) has a higher Group (16 vs 3), while Americium (Am) has a higher Atomic Mass (243 vs 79 u).
Atomic Properties
95
Atomic Number
34
243
Atomic Mass
79
7
Period
4
3
Group
16
Physical Properties
12
Density
5
1,449
Melting Point
494
2,880
Boiling Point
958
63
Molar Heat Capacity
25
Chemical Properties
1
Electronegativity
3
10
Electron Affinity
195
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Data sourced from Periodic-Table-JSON (CC-BY-SA (data is public domain scientific fact)).