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Answer: Ozone
An unstable, diamagnetic, blue gas with a pungent odour is called ozone. It protects the earth and its habitat from penetrating ultraviolet radiation from the sun. It is denoted by O3.
Properties of ozone-
- The molecule’s overall hybrid structure is composed of two major resonance structures.
- The 2 structures are found to be similar to the standpoint of equilibrium.
- Each structure has a positive and negative formal charge on each of the two oxygen atoms.
Formal charges in ozone (O3)
The difference between the valence electron of an atom of a polyatomic molecule or ion in the elemental state and the number of electrons assigned to the atom in Lewis’s structure is called the formal charge of an atom.
Formal charge =
[Total no. of valence e– in the free state] – [total no. of non-bonding pair e– (lone pair)] – 1/2 [total no. of bonding e–]
F.C = 6 – 2 – 1/2(6)
F.C = 4 – 3
F.C = 1
The central atom of ozone has formal charge + 1.
