Why is O₂ NOT considered a compound?

The oxygen molecule O2 is considered a molecule but not a compound. This is because O2 is made of two atoms...

O2 is a molecule due to it being made up of the same elements.

Molecules are made up of the same elements.

Compounds are made up of two or more different elements.

this is true, assuming that the allele is completely recessive and incomplete dominance is not a factor.

the atmospheric gas that forms a mild acid when dissolved in water is called carbon dioxide. the correct answer is a. 2.) chemical weathering would cause an inscription on a marble headstone to become harder and harder to read over time.