Answer:
The Answer is B. 2 Hydrogen atoms and 1 Oxygen atom.
Explanation:
The symbol for a water molecule is H20, and if you know that, the answer will be easier than you expect. So, as we now know, a water molecule symbol is H20, which is 2 hydrogen atoms and one oxygen atom, because if a number is in front of an element, then it means that's how many element atoms there is, like O3 means 3 oxygen atoms. But if there is a molecule with no numbers, that just means one of each atom, like salt/sodium chloride, (NaCl).
