Question

The atomic mass of oxygen is 16 and the molecular mass of ozone is 48. What is the atomicity of ozone if it is an allotrope of oxygen?

• A. $1$
• B. $2$
• C. $3$
• D. $4$

Answer 1

The correct option is C $3$

Allotropes are different forms of the same element. Oxygen has two allotropes as $O_2$ & $O_3$.

As given,the weight of oxygen = $16$ & wt. of ozone$\left(O_3\right)$ = $48$

Therefore no. of oxygen atoms in ozone (Atomicity) $=\frac{48}{16}=3$.

Hence, option C is correct.