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8 January, 10:10

How many gold atoms would have to be lined up to span 6.5mm

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  1. 8 January, 10:26
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    In the tables you can find that the empirical radius of a gold atom is 135 pm.

    That is 135*10^-12 m.

    Then the diameter is two times that: 270*10^-12 m.

    Now calculate how many times that is 6.5 mm = 6.5*10^-3 m

    => (6.5*10^-3 m) / (270*10^-12 m) = 24,074,074.

    Answer: 24,074,074
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