Question

Why is the second ionisation enthalpy of Ca is more than its first ionisation enthalpy​

Answer 1

Explanation:

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the second ionization enthalpy of calcium is higher than the first ionization enthalpy and yet calcium forms cacl2, why? 1. This is because,when Ca2+ combines with 2 Cl- ions,the lattice energy released is large enough to compensate the second and first ionisation energy of Ca. 2.