Wow many pairs of electrons are shared in the
following types of covalent bonds?
a. a single bond
b. a double bond
c. a triple bond

The Explanation is Given below.

Explanation:

Covalent bond:

Covalent bond is formed by mutual sharing of electrons. This mutual sharing of electrons occurs in such a way that each of the combining atom acquires the stable electronic configuration of the nearest noble gas.

a. A single bond :

A single bond is formed when each of the two combining atom share one electron each.

Example: Hydrogen bonding, H - H

b. A double bond :

A double bond is formed when atoms contribute two electrons each.

Example: Oxygen bonding,  O=O

c. A triple bond :

A triple bond is formed on each item contributes three electrons each.

Example: Nitrogen bonding, N≡N

n has four pairs of electrons in the valence shell, electrons repel one another ,n has 7 protons in its nucleus, and since n has 7 protons, it must fill the second shell, giving it 4 pairs of electrons. the electrons form 3 bonds and 1 lone pair of electrons. each pair of electrons repels the other pairs, so they are equally far apart.

so all of the above

ljjjljlj kjlk,ljym jlyu; jm; l mumytj