Question

An element A has 1 electron in its first shell. It combines with element B having 7 electrons in its third shell. What type of bond is formed?

Answer 1

A has one electron in its first shell.

B has 7 electrons in its third shell.

• By assuming that the first shell is the outermost shell for A and the third shell is the outermost shell for B, there will be ionic or electrovalent bond formation.
• There will be a loss of electrons from A.
• There is a gain of electrons by B to attain stability by achieving 8 electrons in the outermost shell shown below.

$\mathrm{A}\to {\mathrm{A}}^{+}+{\mathrm{e}}^{-}$

$\mathrm{B}+{\mathrm{e}}^{-}\to {\mathrm{B}}^{-}$

A⁺B^- will be formed because of electrovalent or ionic bonds.