10(B) Why is the lattice Energy of CaO(s) is -3,460 kj/mol, and lattice energy for K2O(s) is -2,240 kj/mol?

Question

account for the difference as well

Answer 1

See:

http://www.jce.divched.org/JCEDLib/WebWare/collection/reviewed/JCE2005p1584_2WW/index.html

to have calculation and explanation of difference