Add all the subscripts in the formula, including an implicit subscript of 1 when no explicit subscript is shown: 2+1 = 3 atoms total for H2O.
3
There are two atoms of hydrogen in one molecule of H2O.
There are 3 atoms in a water molecule (H2O) - 2 hydrogen atoms and 1 oxygen atom.
There are three atoms in a molecule of water. One oxygen atom and 2 hydrogen atoms. The simplified form for the molecule of water is H2O which is a coded form for the 2 hydrogen and 1 oxygen atoms that make up the molecule.
For the water molecule (H2O) two hydrogen atoms are needed.
The chemical formula of water is H2O; the molecule contain 3 atoms.
One molecule of water contains two atoms of Hydrogen and one atom of Oxygen, which is why its formula is H2O.
There is 1 O atom in 1 H2O molecule thus there are 12 O atoms in 12 H2O molecules.
One atom.
There are two hydrogen atoms in one molecule of water (H2O).
Well there are 2 hydrogen atoms and 1 oxygen atom so therefore the answer is 2 different elements that make up h2o
The borax decahydrate - Na2B4O7.10 H2O has 20 H atoms in the molecule.