Question

Give scientific reason for a molecule of ammonia has lone pair of electrons

Answer 1

In the excited state the hydrogen will occupy the lone pair of nitrogen and the two electrons are left of 1s

Answer 2

Ammonia has one lone pair of electrons.

• Ammonia has four electron pairs.
• The coordination geometry of nitrogen is a tetrahedral arrangement of electron pairs.
• There are only three bonded groups and one lone pair.
• Ammonia molecule reacts with hydroxyl ions of water to form ammonium ions by a covalent bond.
• The ammonium ions are the combination of ammonia molecule and $H^{+}$ ions of the water molecule ($H_{2}O$).
•                $NH_{3} + H^{+} = NH_{4}^{+}$
• However, the lone pair is invisible.