Select the incorrect statement.

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

Lattice energy of an ionic compound depends upon

Which one of the following compounds is ionic?

If the enthalpy of sublimation of $Li$ is $155 \ kJ \ mol^{-1}$, enthalpy of dissociation of $F_2$ is $150 \ kJ \ mol^{-1}$, ionization enthalpy of $Li$ is $520 \ kJ \ mol^{-1}$, electron gain enthalpy of $F$ is $-313 \ kJ \ mol^{-1}$, and standard enthalpy of formation of $LiF$ is $-594 \ kJ \ mol^{-1}$, then the magnitude of the lattice enthalpy of $LiF$ is . . . . . . $kJ \ mol^{-1}$ (nearest integer).

The electronic configurations of elements are $A = 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2$ and $B = 1s^2 2s^2 2p^6 3s^2 3p^5$. Which of the following is the formula of the ionic compound that could be formed between these two elements $A$ and $B$?