Question #a7da1

Jul 22, 2015

There are 4 lone pairs of electrons present in the carbon dioxide molecule.

Explanation:

In order to be able to determine how many lone pairs are present in a carbon dioxide molecule, you need to draw its Lewis structure.

Carbon dioxide has a total of 16 valence electrons, 4 from carbon and 6 from each of the two oxygen atoms.

In order to give the central carbon atom a complete octet, you need to form two double bonds with the two oxygen atoms.

These bonds will account for 8 of the 16 valence electrons the molecule has.

The remaining 8 valence electrons will be placed as lone pairs, two on each oxygen atom.

As a result, you can say that the carbon dioxide molecule has a total of 4 lone pairs of electrons.

Now, there are other ways in which you can draw the Lewis structure for the $C {O}_{2}$ molecule, but the structure shown above is the most stable. You can read more about that here:

http://socratic.org/questions/how-can-i-draw-the-lewis-structure-for-co2