* H₂: This part of the formula represents two hydrogen atoms. The subscript '2' indicates that there are two hydrogen atoms in the molecule.
* O₂: This part of the formula represents two oxygen atoms. Similar to the hydrogen atoms, the subscript '2' indicates that there are two oxygen atoms in the molecule.
Therefore, the molecule H₂O₂ has:
* 2 hydrogen atoms
* 2 oxygen atoms
In total, there are 4 atoms in a molecule of H₂O₂. This molecule is known as hydrogen peroxide.
