Question

im not sure if it is a molecule or an atom ​

Answer 1

Answer:

the first one

Explanation:

I looked it up:P

Answer 2

Only the 2nd answer is right, uncheck the 1st one

Explanation:

If we had a chemical formula like $3(O_{2} )$ the 3 means there are 3 molecules of $O_{2}$. The 2 means there are two atoms of oxygen in each molecule.