${\mathrm{H}}_3{\mathrm{P}\mathrm{O}}_3$ can be represented by structures $1$ and $2$ shown below. Can these two structures be taken as the canonical forms of the resonance hybrid representing ${\mathrm{H}}_3\mathrm{P}{\mathrm{O}}_3$? If not, give reasons for the same.

Use Lewis symbols to show electron transfer between the following atoms to form cations and anions : 

$\mathrm{K}$ and $\mathrm{S}$

Use Lewis symbols to show electron transfer between the following atoms to form cations and anions :

$\mathrm{Ca}$ and $\mathrm{O}$

Use Lewis symbols to show electron transfer between the following atoms to form cation and anion: 

$\mathrm{Al}$ and $\mathrm{N}$