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How many atoms are in h2o?

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A water molecule is composed of three atoms. There are two atoms of hydrogen (H2) and one atom of oxygen (O) in each molecule of water. Water molecules also contain four lone pair electrons on the oxygen atom. 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

Best Answer: H2 → 2 Hydrogen atoms O → an Oxygen atom So, there are 3 atoms in one H2O molecule. read more

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