Question

Polar molecules have _____.

an unequal number of positive and negative particles

atoms that are the same element

an equal number of positive and negative particles

ionic bonds

Answer 1

an unequal number of positive and negative particles, polar molecules have a positive and a negative side, so they have to be unequal

Answer 2

Answer: Polar molecules have an equal number of positive and negative particles.

Explanation: There are two types of molecules:

1) Polar molecules: This molecule is formed when two different atoms having different electronegativities combine together. The more electronegative atom attracts the shared pair of electron towards itself, thus acquiring a partial negative charge and other atom acquiring partial positive charge. This results in the formation of dipole. In this equal number of positive and negative particles.

For example: HCl. As this molecule is covalent in nature and is also a polar molecule.

2) Non-polar molecules: This is formed when two atoms of same electronegativity combine together. For Example: $H_2,O_2$ etc.

Hence, Polar molecules have an equal number of positive and negative particles.