How many covalent bonds join the atoms in a molecule of ammonia (nh3)?

3 covalent bonds

Explanation:

Covalent bond is formed by equal sharing of bonded Electrons.

Generally covalent bond is formed between non metals. In our example, NH3 ,both N and H are non metals.

In NH3, nitrogen is Central atom and it is surrounded by 3 He.

Each hydrogen is attached to nitrogen by covalent bonds.

Hence no of covalent bonds:3

2b2t

explanation:

2b2t

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.