molecules of two different compounds contain the same number of atoms of each element but have different arrangement of atoms. which term correctly describes these two substances?

a) isomers
b) isotopes
c) polymers
d) none of the above

a simple google for each answer would quickly reveal that it's (A)

The term that correctly describes two substances that contain the same number of atoms of each element but have different arrangements of atoms is "isomers," so the correct answer is a) isomers.

Isomers are different compounds that have the same molecular formula but differ in the arrangement or spatial orientation of their atoms. This means that isomers have the same types and numbers of atoms but may have different connectivity or structural arrangements.

To determine this answer, it is important to understand the definitions of the given choices:
a) Isomers: Different compounds with the same molecular formula but different arrangements of atoms.
b) Isotopes: Atoms of the same element that have different numbers of neutrons.
c) Polymers: Large molecules made up of repeating structural units called monomers.
d) None of the above: Since the correct term is "isomers", option d) is not appropriate in this case.

Therefore, the correct answer is a) isomers.