Question

Identify if it represents atom, molecule, or ion.

Options:
A) He - ATOM
B) CO2 - MOLECULE
C) O2 - MOLECULE
D) Cu2+ - ION

Answer 1

He - ATOM, CO2 - MOLECULE, O2 - MOLECULE, Cu2+ - ION. A molecule is a combination of two or more atoms, while an ion has a charge due to gaining or losing electrons.

Step-by-step explanation:

A) He represents an ATOM.
B) CO2 represents a MOLECULE.
C) O2 represents a MOLECULE.
D) Cu2+ represents an ION.

A molecule is a combination of two or more atoms. In this case, CO2 and O2 are both molecules because they consist of multiple atoms bonded together. On the other hand, Cu2+ is an ion because it has gained or lost electrons and has a charge.