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Number of atoms in a cell

  1. May 20, 2004 #1

    mee

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    I know there are trillions of cells in an adult human body but how many atoms are in each cell?
     
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  3. May 20, 2004 #2

    Monique

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    Very crude: What does the average adult weigh, devide by the number of cells. What are the most common atoms in a cell and what are their relative abundancies, what do they weigh on average. Divide the weight of a cell by the average weight of the atoms represented in a cell.. and there you get your number :)

    Maybe someone already figured it out and you can find it on Google :)
     
  4. May 21, 2004 #3

    arildno

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    Even cruder, but it should be an upper bound on the number of atoms in a cell:
    Let V be the average volume of a cell.
    Then we should have the inequality for the number n atoms in a cell:
    [tex]n\leq\frac{V}{\frac{4}{3}\pi{R}^{3}}[/tex]

    Where R is an average value for an atomic radius
     
  5. May 21, 2004 #4

    Monique

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    But how much space is taken up by the 3D structure of a molecule, and how much space is there between molecules..
     
  6. May 21, 2004 #5

    arildno

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    That's why it's such an awfully crude upper bound :smile:
     
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