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 compounds has the highest lattice enthalpy?

Provide the steps and their corresponding enthalpies for the formation of $NaCl$ (sodium chloride).

Which of the following is generally true about ionic compounds?

Which one of the following compounds is ionic?