Arsenic (As)vsSelenium (Se)
Selenium (Se) has a higher Electron Affinity (195 vs 78 kJ/mol), while Arsenic (As) has a higher Density (6 vs 5 g/cm³), while Selenium (Se) has a higher Electronegativity (3 vs 2 Pauling).
Atomic Properties
33
Atomic Number
34
75
Atomic Mass
79
4
Period
4
15
Group
16
Physical Properties
6
Density
5
N/A
Melting Point
494
N/A
Boiling Point
958
25
Molar Heat Capacity
25
Chemical Properties
2
Electronegativity
3
78
Electron Affinity
195
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Data sourced from Periodic-Table-JSON (CC-BY-SA (data is public domain scientific fact)).