The lattice energies of $KF$,$KCl$,$KBr$ and $KI$ follow the order:

In a crystal,cations and anions are held together by

The electronic configurations of four elements $L$,$P$,$Q$,and $R$ are given as: $L (1s^2, 2s^2 2p^4)$; $Q (1s^2, 2s^2 2p^6, 3s^2 3p^5)$; $P (1s^2, 2s^2 2p^6, 3s^1)$; $R (1s^2, 2s^2 2p^6, 3s^2)$. The formulas of the ionic compounds that can be formed between these elements are:

Which of the following statements is correct for $CsBr_3$?

The pair in which the first compound is ionic and the second compound is covalent,is

Which of the following substances is ionic in nature?