Actinium (Ac)vsRuthenium (Ru)
Ruthenium (Ru) has a higher Electron Affinity (101 vs 34 kJ/mol), while Ruthenium (Ru) has a higher Group (8 vs 3), while Actinium (Ac) has a higher Atomic Mass (227 vs 101 u).
Atomic Properties
89
Atomic Number
44
227
Atomic Mass
101
7
Period
5
3
Group
8
Physical Properties
10
Density
12
1,500
Melting Point
2,607
3,500
Boiling Point
4,423
27
Molar Heat Capacity
24
Chemical Properties
1
Electronegativity
2
34
Electron Affinity
101
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Data sourced from Periodic-Table-JSON (CC-BY-SA (data is public domain scientific fact)).