The element which readily forms an ionic bond has the electronic configuration

Select the incorrect statement.

An ionic bond $P^{+} Q^{-}$ is most likely to be formed when

Among the following oxides,which has the maximum lattice energy?

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:

What is the effect of a more electronegative atom on the strength of an ionic bond?