Based on VSEPR theory explain the structure of ammonia.

Explanation

Ammonia `(NH_(3))`
Electronic configuration of `N: 1s^(2)2s^(2)2p^(3)`
Valance orbital representation

1 When `2s^(2)` orbital hybridised with `2p_(x), 2p_(y) and 2p_(z)` forms the following `sp^(3)` hybridised structure.
2 in `2s^(2)` orbital, the electrons are paired up hence they are not involved in bond formation called loan paired of electron (L.P)
3 When `sp^(3)` hybridized N combines with 3 hydrogen atom, forms pyramidal structure of ammonia. Pyramidal structure angle `=107^(@)`.