Americium (Am)vsProtactinium (Pa)
Protactinium (Pa) has a higher Electron Affinity (53 vs 10 kJ/mol), while Protactinium (Pa) has a higher Boiling Point (4,300 vs 2,880 K), while Protactinium (Pa) has a higher Electronegativity (2 vs 1 Pauling).
Atomic Properties
95
Atomic Number
91
243
Atomic Mass
231
7
Period
7
3
Group
3
Physical Properties
12
Density
15
1,449
Melting Point
1,841
2,880
Boiling Point
4,300
63
Molar Heat Capacity
N/A
Chemical Properties
1
Electronegativity
2
10
Electron Affinity
53
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Data sourced from Periodic-Table-JSON (CC-BY-SA (data is public domain scientific fact)).