Question

For which of the following crystals would U expect anion anion contact to be valid and why; a] CsBr; b]NaI; c]NaF; d]KCl

Answer 1

kcl NaF NaI
reson is behind that when you are choose central atom should not to take largely atom and not be small atom surrounding so
in Frist cesium is largest in alkali metal
and rest all three are exit..