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

trigonal pyramidal

tetrahedral

trigonal planar

bent

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6