Which statement explains why ozone gas, o3, and oxygen gas, o2, have different properties?
(1) they are formed from different elements.
(2) they have different molecular structures.
(3) they have different oxidation numbers.
(4) they have different electronegativities.

The correct answer is option (2).

Explanation:

Oxygen gas and ozone gas are compounds of oxygen with different molecule arrangement . They both also differ in number of total atoms in their molecules.

Oxygen is made up of two oxygen atoms where as ozone molecule is amde up of three oxygen atoms.

Oxygen = (Paramagnetic)

Ozone = (diamagnetic)

Structure of both ozone and oxygen are given the in an image attached.