Question

Identify the number of bonding pairs and lone pairs of electrons in carbon dioxide. a) 2 bonding pairs and 4 lone pair b) 4 bonding pairs and 2 lone pairs c) 4 bonding pairs and 4 lone pairs d) 2 bonding pairs and 2 lone pairs e) 4 bonding pairs and 1 lone pair

Answer 1

Option (b) is correct

Explanation:

The number of bonding pairs and lone pairs of electrons in carbon dioxide 4 bonding pairs and 2 lone pairs  

• The carbon has 4 electrons in its outer energy shell(group 4)
• Each oxygen present in the carbon dioxide molecule contributes 2 electrons - 1 for each bond formation.

∴ There is a total of 8 electrons outside the carbon, present in 4 pairs.

• As there are 4 bonds, they form all bond pairs forming 4 bond pairs.
• Each oxygen atom carries a lone pair of electron hence 2 lone pairs are present

Answer 2

Carbon dioxide is a gas molecule that is made up of one carbon element and 2 oxygen elements. All the element is joined together by the bonds shared by the electrons.

Carbon dioxide molecule has:-

• 2 sigma bond
• 2 -pi bond

Each bond represents the 2 electrons shared by both elements.

The total number of bonds is 4 and the total number of lone pairs is 2 which are present in the oxygen molecule.

Ö=C=Ö is the structural formula of carbon dioxide.

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