Which of these is a molecule but is not considered to be a compound?

Question

Quizplus · Accepted Answer

A molecule is a combination of two or more atoms held together by a chemical bond. H₂ is a molecule because it is the combination of two hydrogen atoms. However, it is not a compound because it is made up of only one element, hydrogen. A compound is made up of two or more different elements in fixed proportions. The other options (A, B, C, and E) are all compounds because they are made up of different elements in fixed proportions.

Which of These Is a Molecule but Is Not Considered