Polonium (Po)vsPromethium (Pm)
Polonium (Po) has a higher Electron Affinity (136 vs 12 kJ/mol), while Polonium (Po) has a higher Group (16 vs 3), while Promethium (Pm) has a higher Boiling Point (3,273 vs 1,235 K).
Atomic Properties
84
Atomic Number
61
209
Atomic Mass
145
6
Period
6
16
Group
3
Physical Properties
9
Density
7
527
Melting Point
1,315
1,235
Boiling Point
3,273
26
Molar Heat Capacity
N/A
Chemical Properties
2
Electronegativity
1
136
Electron Affinity
12
Similar Comparisons to Polonium (Po) vs Promethium (Pm)
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Data sourced from Periodic-Table-JSON (CC-BY-SA (data is public domain scientific fact)).