Question

multiple - choice question
which statement best describes each group of atoms in water?
they all contain 1 hydrogen atom and 2 oxygen atoms.
they all contain 1 oxygen atom and 2 hydrogen atoms.
they all are different from each other.

Explanation:

The chemical formula of water is H₂O, which means each water - molecule contains 1 oxygen atom and 2 hydrogen atoms.

Answer:

They all contain 1 oxygen atom and 2 hydrogen atoms.