An atom $\mathrm{X}$ has electronic configuration $2,8,7$. It combines with $\mathrm{Y}$ having $1$ electron in its outermost shell.

What type of bond will be formed between $\mathrm{X}$ and $\mathrm{Y}$.

An atom $\mathrm{X}$ has electronic configuration $2,8,7$. It combines with $\mathrm{Y}$ having $1$ electron in its outermost shell.

Write the formula of the compound formed.

Draw orbit structure diagram of sodium chloride $\left(\mathrm{NaCl}\right)$.

Draw orbit structure diagram of calcium oxide $\left(\mathrm{CaO}\right)$.

[Atomic numbers $\mathrm{Ca}=20, \mathrm{O}=8$]

Compare :

sodium atom and sodium ion

Compare:

chlorine atom and chloride ion, with respect to atomic structure.

Compare chlorine atom and chloride ion, with respect to their electrical state.