Ammonia (NH3) is made up of one atom of nitrogen and three atoms of hydrogenAtomic number of N = 7Electronic configuration = 2, 5Atomic number of H = 1Electronic configuration = 1So hydrogen needs 1 more electron to complete its duplet and nitrogen needs three more electrons to complete its octetHence three hydrogen atoms will combine with nitrogen to form ammonia

Ammonia is formed by combining two non metals nitrogen and hydrogen so covalent bond is between hydrogen and nitrogen atom N2 + H2——————>NH3To form one NH3 atom 3H2combines with 1 nitrogen atom
The ammonia molecule is formed by covalent bonding between one Nitrogen atom and three Hydrogen atoms

NH3 N- 2,5 and H -1 covalant bond is formed between N and H Nitrogen want 3 electon and H wnat 1 electron so nitrogen share its 3 electron with 3 hydrogen molecule and those molecules give their electrons for sharing