Calcium (Ca)vsPotassium (K)
Potassium (K) has a higher Electron Affinity (48 vs 2 kJ/mol), while Calcium (Ca) has a higher Melting Point (1,115 vs 337 K), while Calcium (Ca) has a higher Group (2 vs 1).
Atomic Properties
20
Atomic Number
19
40
Atomic Mass
39
4
Period
4
2
Group
1
Physical Properties
2
Density
1
1,115
Melting Point
337
1,757
Boiling Point
1,032
26
Molar Heat Capacity
30
Chemical Properties
1
Electronegativity
1
2
Electron Affinity
48
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Data sourced from Periodic-Table-JSON (CC-BY-SA (data is public domain scientific fact)).