Question

Total number of protons present in a molecule of ${\mathrm{H}}_2\mathrm{O}$ is _____.

Answer 1

• Water molecule consist of two hydrogen atoms and one oxygen atom
• Each hydrogen atom has one proton and oxygen atom has 8 proton, so total water molecule has(2+8) = 10 protons
• Therefore, total number of protons present in a molecule of ${\mathrm{H}}_2\mathrm{O}$ is 10.