Question

Which combination of ions gives an ionic compound with maximum lattice energy?
(1) Rb (ii) Sr(iii) AP (iv) SO,(v) NS-(vi) Br​

Answer 1

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Answer 2

Answer:

lattice energy = lattice energy is the energy required to change or convert the 1 mole of the solid ion into a gaseous ion.  

THE FACTORS WHICH AFFECT THE LATTICE ENERGY ARE  

a) Charge held by the Constituent Ions

b) Distance between the Ions

• the more the smaller size the more will be able to get closest.  
• the lattice energy is inversely proportional to the size of the atom. the more smallest ion the more will be lattice energy.  

i.e. lattice energy ∝ 1/ size of ion.

• in the periodic table as we see at the top of the periodic table the ions have a smaller size.  

so we can conclude that in the option( iii)Al and (v) NS⁻ has maximum lattice energy.