• Question: How many atoms are part of our body(Roughly)?

    Asked by Steve to Ashley, Bernard, Carsten, MariaMagdalena, Monique on 19 Nov 2015. This question was also asked by Sammy Beck.
    • Photo: Monique Henson

      Monique Henson answered on 19 Nov 2015:

      Hmm I’ve not really thought about this much before. To get a rough idea, let’s assume the human body is made out of water. Obviously we know that’s not true, but it’s mostly water, so it’s a good start. One water molecule has a mass of around 10^(-26)kg I think. If the average person has a mass of around 70kg, then the number of atoms is 70/10^(-26) = 7 * 10^(27). That’s 7 followed by 27 zeros – so quite a lot!

Comments