Bleach is a common name for a solution of sodium hypochlorite (NaClO). Here's how to break down the number of oxygen and hydrogen atoms:

* Sodium hypochlorite (NaClO):

* Sodium (Na): 1 atom per molecule

* Chlorine (Cl): 1 atom per molecule

* Oxygen (O): 1 atom per molecule

Therefore, each molecule of bleach contains one oxygen atom.

Hydrogen is not directly present in the main component of bleach (NaClO). However, bleach is typically a solution in water (H₂O), meaning there are many hydrogen atoms in the water molecules that make up the bleach solution.

To summarize:

* Oxygen atoms: 1 per molecule of NaClO

* Hydrogen atoms: Not directly in NaClO, but present in the water used to make the bleach solution.