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I want to know if it's possible to find out how many atoms are in something, and how one would do that. For example, how many quarks are in my brain(easy to find out once you know how many atoms there are)?

So I ask again ... how does one find out how many atoms are in something, and of what kind of atoms these are?

EXAMPLE: My brain.

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For example, how many quarks are in my brain(easy to find out once you know how many atoms there are)?

Actually it's easier to count how many atoms are in your brain than how many quarks are in your brain. As you may know there are three quarks per nucleon in your brain... but this is not the whole truth. The force the binds quarks together creates a soup of additional 'sea' quarks, which are short-lived quarks that are constantly fizzing in and out of existence in the nucleon. See http://en.wikipedia.org/wiki/Quark#Sea_quarks for more details.

As for your question... see @AstoundingJB's hint.

kd88
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