Americium (Am)vsHelium (He)
Americium (Am) has a higher Electron Affinity (10 vs -48 kJ/mol), while Americium (Am) has a higher Melting Point (1,449 vs 1 K), while Americium (Am) has a higher Boiling Point (2,880 vs 4 K).
Atomic Properties
95
Atomic Number
2
243
Atomic Mass
4
7
Period
1
3
Group
18
Physical Properties
12
Density
0
1,449
Melting Point
1
2,880
Boiling Point
4
63
Molar Heat Capacity
N/A
Chemical Properties
1
Electronegativity
N/A
10
Electron Affinity
-48
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Data sourced from Periodic-Table-JSON (CC-BY-SA (data is public domain scientific fact)).