Question

Which substances have atoms of the same element but different molecular structures?

A. He(g) and Ne(g)
B. K(s) and Na(s)
C. O2(g) and O3(g)
D. P4(s) and S8(s)

Answer 1

You can see that's C.
Both
`O_2` and
`O_3` have atoms of oxygen but the first molecule is diatomic but the second is triatomic.

Answer 2

Answer: Th correct answer is option C.

Explanation:

Atoms are the smallest unit of a chemical element.

An element is defined as the simplest substance which cannot be further divided.

A molecule is defined as the combination of two or more atoms of same or different elements.

Fro the given options, option 3 and 4 are the molecules, but Option 3 has the different number of atoms of same element. These molecules have different molecular structures.

`O_2` is the oxygen gas and
`O_3` is ozone.

Hence, the correct answer is option C.