Question

Draw the electron dot structure of ammonia molecule.

Answer 1

Lewis dot structure

G.N Lewis, an American chemist, introduced a simple notation to represent valence electrons in an atom. This notation is called Lewis symbol or electron dot structure

• Nitrogen has 5 electrons in the valence shell.
• It needs 3 more electron to attain stability.
• Hydrogen has only one electron in the valence shell
• So Nitrogen shares its 3 valence electrons with three hydrogen atom to form ammonia

$:\mathrm{N}⋮+3·\mathrm{H}\to \underset{\mathrm{Ammonia}}{\mathrm{H}\underset{··}{\overset{\underset{··}{\mathrm{H}}}{:\mathrm{N}:}}\mathrm{H}}$