The answer is one. Water’s chemical symbol is H2O. This means that there are 2 hydrogen (H)atoms and 1 oxygen atom in 1 water molecule. read more
Oxygen is generally eager to bind with hydrogen. These atoms bond strongly with each other, and the resulting water molecule is unusually stable and resistant to decomposition. Within each water molecule, oxygen is bound to hydrogen by a covalent bond consisting of two shared electrons per hydrogen atom. read more
A molecule of oxygen contains two atoms. Oxygen never exists freely in nature but rather exists as a diatomic molecule, meaning two oxygen atoms bond together and share electrons. Other diatomic molecules include chlorine and hydrogen. read more