Actinium (Ac)vsHydrogen (H)
Actinium (Ac) has a higher Atomic Mass (227 vs 1 u), while Actinium (Ac) has a higher Boiling Point (3,500 vs 20 K), while Actinium (Ac) has a higher Density (10 vs 0 g/cm³).
Atomic Properties
89
Atomic Number
1
227
Atomic Mass
1
7
Period
1
3
Group
1
Physical Properties
10
Density
0
1,500
Melting Point
14
3,500
Boiling Point
20
27
Molar Heat Capacity
29
Chemical Properties
1
Electronegativity
2
34
Electron Affinity
73
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Data sourced from Periodic-Table-JSON (CC-BY-SA (data is public domain scientific fact)).