Question

In carbon dioxide (CO2), there are two oxygen atoms for each carbon atom. Each oxygen atom forms a double bond with carbon, so the molecule is formed by two double bonds.Two double bonds means that the total number of electrons being shared in the molecule is
A) Two
B) Four
C) Six
D) Eight

Answer 1

Answer: Option (D) is the correct answer.

Explanation:

The atomic number of carbon is 6 and atomic number of oxygen is 8. Therefore, there are 4 valence electrons in carbon and there are 6 valence electrons in oxygen.

Each carbon and oxygen atom shares 4 electrons to form one double bond. It is known that a $CO_{2}$ molecule has 2 double bonds hence, there will be total sharing of 8 electrons.

Thus, we can conclude that two double bonds means that the total number of electrons being shared in the molecule is 8.

Answer 2

Answer:The correct answer is option D.

Explanation:

In carbon-dioxide molecule, there are two oxygen atoms and one carbon atom.

Sharing of two electrons between the atom give rise to single bond.

In single bond = 2 electrons

So, in a  double bond = 2 × 2 = 4 electrons

There are two doubles bonds in the carbon-dioxide molecule, so the total number of the electrons ebbing shared in the molecule is =

=4 electrons × 2 = 8 electrons

Hence,the correct answer is option D.