Question

Draw the Lewis structures of the given molecules. Include lone pairs on all atoms where appropriate. 

OF₂ CO₂

Answer 1

Concepts and reason

Lewis structure shows bonding between atoms present in a molecule, lone pair of electrons can also be placed on the atoms.

Draw the Lewis structures for the molecules by determining the number of valance electrons of the molecules.

Fundamentals

A pair of valance electrons that does not involve in chemical bond is called as lone pair of electrons.

The molecule ${\rm{O}}{{\rm{F}}_2}$ has central atom oxygen and it is surrounded with two fluorine atoms.

Determine the total number of valance electrons as shown below.

$\begin{array}{l}\\1 \times {\rm{ Valance electrons in Oxygen = 1}} \times {\rm{6 = 6 }}{{\rm{e}}^ - }\\\\2 \times {\rm{ Valance electrons in fluorine = 2}} \times 7{\rm{ = 14 }}{{\rm{e}}^ - }\\\\\overline {{\rm{ Total valance electrons = 20 }}{{\rm{e}}^ - }} \\\end{array}$

Draw the Lewis structure of the molecule basing on the total valance electrons of the molecule as shown below.

The molecule ${\rm{C}}{{\rm{O}}_2}$ has central atom carbon atom and it is surrounded with two oxygen atoms.

Determine the total number of valance electrons as shown below.

$\begin{array}{l}\\1 \times {\rm{ Valance electrons in carbon = 1}} \times 4{\rm{ = 4 }}{{\rm{e}}^ - }\\\\2 \times {\rm{ Valance electrons in oxygen = 2}} \times 6{\rm{ = 12 }}{{\rm{e}}^ - }\\\\\overline {{\rm{ Total valance electrons = 16 }}{{\rm{e}}^ - }} \\\end{array}$

Draw the Lewis structure of the molecule basing on the total valance electrons of the molecule as shown below.

Ans:

Lewis is structure of the molecule is as follows:

Answer 2

Answer 3