Americium (Am)vsBeryllium (Be)
Americium (Am) has a higher Electron Affinity (10 vs -48 kJ/mol), while Americium (Am) has a higher Atomic Mass (243 vs 9 u), while Americium (Am) has a higher Atomic Number (95 vs 4).
Atomic Properties
95
Atomic Number
4
243
Atomic Mass
9
7
Period
2
3
Group
2
Physical Properties
12
Density
2
1,449
Melting Point
1,560
2,880
Boiling Point
2,742
63
Molar Heat Capacity
16
Chemical Properties
1
Electronegativity
2
10
Electron Affinity
-48
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Data sourced from Periodic-Table-JSON (CC-BY-SA (data is public domain scientific fact)).