Question

which of the following has high lattice energy?
1)Licl 2)Mgcl2 3)Nacl 4)Cscl​

Answer 1

Answer:

CsCl has high lattice energy because of the high atomic number

Answer 2

Answer: Option (4) is the correct answer.

Explanation:

Lattice energy is defined as the energy released when formation of 1 mole of an ionic compound occurs due to the combination of its constituent ions. So, more is the ionic character of a substance more will be its lattice energy.  

When we move down a group, size of the elements tend to increase due to which distance between nucleus and valence electrons increases. As a result, it becomes easier to remove an electron and ionic electron increases.

In CsCl, there is high ionic character due to which it has high lattice energy. As a result, cesium is able to easily donate electrons to the chlorine atom which increases its ionic character.

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