I cannot believe I just read that. It made me laugh a lot, thanks.

Though I don't think this is a serious debate, your answer appears to belie my belief. An excellent example of getting it nearly right, and yet oh-so wrong.

An atom of Hydrogen on its own is not a gas. An atom of Oxygen on its own is not a gas. A molecule of H20 is not, on its own, a liquid. (look up what makes a gas and a liquid for why)

When you have more than one atom of hydrogen (same for oxygen) at room temperature it forms a gas. When you mix molecules of H20 together at room temperature they form a liquid. When you mix hydrogen gas with oxygen gas, they do not form a liquid, they form a mixture of hydrogen and oxygen gases. However, when hydrogen atoms and oxygen atoms are bonded together (as you so nearly got it) to form molecules they are no longer two gases, but a single mixture of H20 molecules, or water.

Where did you study? Your teacher needs a slap.