Number of Atoms in the Human Body

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How many atoms are there in the human body?

7 Ã— 1027 atoms.

There are approximately 7 Ã— 1027 atoms that can be found in an average human body. This is equivalent to 7 octillion atoms or 7,000,000,000,000,000,000,000,000,000 if written out in long scale. This is according to an approximation made by the Science Education Program of the Thomas Jefferson National Accelerator Facility.


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