Question

MgO is harder than CaO. give reason
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Answer 1

Answer:

MgO and CaO, both have the same anion that is the oxide ion (O2-). As Magnesium ion is smaller than the calcium ion, therefore the charge in case of Mg+2 ion is more than the Ca+2 ion. ... As a result, the lattice energy will be more in case MgO than CaO.

Answer 2

Answer:

Explanation:

MgO and CaO, both have the same anion that is the oxide ion (O2-). As Magnesium ion is smaller than the calcium ion, therefore the charge in case of Mg+2 ion is more than the Ca+2 ion. ... As a result, the lattice energy will be more in case MgO than CaO.

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