Question

in the box provided explain why living organisms contain more hydrogen atoms than any other atoms, yet 65% of a typical organisms mass is oxygen.

Explanation:

Hydrogen has a low atomic mass (about 1 atomic mass unit), while oxygen has a much higher atomic mass (about 16 atomic mass units). Although there are more hydrogen atoms in living - organisms, their low mass means they contribute less to the overall mass compared to oxygen atoms.

Answer:

Hydrogen has a low atomic mass compared to oxygen. Despite a higher number of hydrogen atoms in living organisms, oxygen's greater atomic mass makes it account for 65% of a typical organism's mass.