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why does calcium form bivalent compounds , even though its 2 nd ionisation enthalpy is greater than the 1 st one?

why does calcium form bivalent compounds , even though its 2nd ionisation enthalpy  is greater than the 1st one?

Grade:12

1 Answers

Gaurav
askIITians Faculty 164 Points
9 years ago
Hello Student
Atomic number of Ca is 20. It has 2 electrons in its valence shell. It can easily release these two electrons go get stable noble gas electronic configuration. This is why it forms bivalent ionic compounds.
Also, 2nd ionization energy is always greater than 1st ionization energy of any element.

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