Californium (Cf)vsPromethium (Pm)
Promethium (Pm) has a higher Electron Affinity (12 vs -97 kJ/mol), while Californium (Cf) has a higher Density (15 vs 7 g/cm³), while Promethium (Pm) has a higher Boiling Point (3,273 vs 1,743 K).
Atomic Properties
98
Atomic Number
61
251
Atomic Mass
145
7
Period
6
3
Group
3
Physical Properties
15
Density
7
1,173
Melting Point
1,315
1,743
Boiling Point
3,273
N/A
Molar Heat Capacity
N/A
Chemical Properties
1
Electronegativity
1
-97
Electron Affinity
12
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Data sourced from Periodic-Table-JSON (CC-BY-SA (data is public domain scientific fact)).