Question

Estimate the number of atoms in your body.

Answer 1

An average adult of weigh 70 kg has approximately $7.0 \times 10^{27}$.

Explanation:

Estimation of Atoms in Human Body

We generally evaluate the amount of elements, liquid, or solid bones in a human body but, we can relate these counts to the atomic level as well. Talking about the approximate amount of Hydrogen, Oxygen and Carbon that we carry in our body, they all make 99% of it neglecting 1% of trace elements.

On the basis of this calculation, we can say that a human body of weight 70 kg has around $7.0 \times 10^{27}$ atoms that are differentiated as 2/3 of hydrogen atoms, 1/4 of Oxygen and only 1/3 of Carbon atoms in the total count.