Actinium (Ac)vsThorium (Th)
Thorium (Th) has a higher Electron Affinity (113 vs 34 kJ/mol), while Thorium (Th) has a higher Boiling Point (5,061 vs 3,500 K), while Thorium (Th) has a higher Melting Point (2,023 vs 1,500 K).
Atomic Properties
89
Atomic Number
90
227
Atomic Mass
232
7
Period
7
3
Group
3
Physical Properties
10
Density
12
1,500
Melting Point
2,023
3,500
Boiling Point
5,061
27
Molar Heat Capacity
26
Chemical Properties
1
Electronegativity
1
34
Electron Affinity
113
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Data sourced from Periodic-Table-JSON (CC-BY-SA (data is public domain scientific fact)).