Re: How many atoms are there in the human body?

Howdy rs -

You can estimate the number of atoms in the human body by doing the following:

1. First, you need to find the total mass of each element in the body. You can locate one of many online tables with this information by running a search at Altavista for a query such as +"human body" +elements +carbon +iron +calcium
2. If needed, convert weights measurements into grams (remember, you need to know the mass of each element).
3. Using a Periodic Table, find the number of moles for each element. The periodic table shows atomic mass units. A mole equals the a.m.u. in grams -- so carbon, which has an atomic mass of 12, has 12 grams in a mole.
4. Add the moles together.
5. Multiply the final number by Avogadro's number and you should have your estimate.

L. Bry, MadSci Admin