The electronic configuration of four elements L, P, Q and R are given in brackets

$\mathrm{L}\mathrm{\hspace{0.17em}\hspace{0.17em}}\left(1{\mathrm{s}}^2,2{\mathrm{s}}^2,2{\mathrm{p}}^4\right);\mathrm{\hspace{0.17em}}\mathrm{P}\mathrm{\hspace{0.17em}}\left(1{\mathrm{s}}^2,2{\mathrm{s}}^{2}2{\mathrm{p}}^6,3{\mathrm{s}}^1\right)$

$\mathrm{Q}\hspace{0.17em}\hspace{0.17em}\left(1{\mathrm{s}}^2,2{\mathrm{s}}^{2}2{\mathrm{p}}^6,3{\mathrm{s}}^{2}3{\mathrm{p}}^5\right);\mathrm{\hspace{0.17em}}\mathrm{R}\mathrm{\hspace{0.17em}}\left(1{\mathrm{s}}^2,2{\mathrm{s}}^{2}2{\mathrm{p}}^6,3{\mathrm{s}}^2\right)$

The formulae of ionic compounds that can be formed between these elements are