How many types of atoms can you expect to find in a pure sample of any element?

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Offline The Scientist

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Please elaborate upon explanation. Thanks.
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Offline Bored chemist

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It depends.
Some substances like iodine have only one stable isotope so all the atoms in a sample of pure iodine are identical.
Tin, on the other hand has a hat full of different isotopes (ten iirc) so a pure tin sample would contain 10 different sorts of atoms.
In practice you will never get a pure sample of a material.
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