Promethium (Pm)vsRubidium (Rb)
Promethium (Pm) has a higher Density (7 vs 2 g/cm³), while Promethium (Pm) has a higher Melting Point (1,315 vs 312 K), while Rubidium (Rb) has a higher Electron Affinity (47 vs 12 kJ/mol).
Atomic Properties
61
Atomic Number
37
145
Atomic Mass
85
6
Period
5
3
Group
1
Physical Properties
7
Density
2
1,315
Melting Point
312
3,273
Boiling Point
961
N/A
Molar Heat Capacity
31
Chemical Properties
1
Electronegativity
1
12
Electron Affinity
47
Similar Comparisons to Promethium (Pm) vs Rubidium (Rb)
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Data sourced from Periodic-Table-JSON (CC-BY-SA (data is public domain scientific fact)).