#
What has more lattice energy amongst

BaO and SrO

Please explain..

Here the charge on metal and the anion are same, so the deciding factor for lattice energy will be the size of cation.

Now, smaller the size of cation, smaller is the internuclear distance between the cation and anion and hence greater is the force of attraction between the two ions and consequently greater is the magnitude of lattice energy.

Sr

^{2+}and Ba

^{2+}both belongs to group 2 element and Sr

^{2+}lies above Ba

^{2+}. As we go down the group, size of metal increases,therefore Ba

^{2+}is larger in size than Sr

^{2+}.

Therefore, SrO will have higher lattice energy than BaO.

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