Actinium (Ac)vsYttrium (Y)
Actinium (Ac) has a higher Atomic Mass (227 vs 89 u), while Actinium (Ac) has a higher Atomic Number (89 vs 39), while Actinium (Ac) has a higher Density (10 vs 4 g/cm³).
Atomic Properties
89
Atomic Number
39
227
Atomic Mass
89
7
Period
5
3
Group
3
Physical Properties
10
Density
4
1,500
Melting Point
1,799
3,500
Boiling Point
3,203
27
Molar Heat Capacity
27
Chemical Properties
1
Electronegativity
1
34
Electron Affinity
30
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Data sourced from Periodic-Table-JSON (CC-BY-SA (data is public domain scientific fact)).