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How many carbon atoms is present in our human bones?

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So bone is roughly 15% carbon by weight, meaning that each gram of bone contains roughly 7.5x10 [math]^{21}[/math] carbon atoms. The skeleton typically makes up about 15% of the body mass, so the skeleton of a 70 kg person would contain about 5.2x10 [math]^{26}[/math] carbon atoms: 520 trillion trillion. read more

There are approximately 7 x 10 27 atoms in the average human body. This is the estimate for a 70 kg adult human male. Generally, a smaller person would contain fewer atoms; a larger person would contain more atoms. Atoms in the Body. On average, 87% of the atoms in the body are hydrogen or oxygen. read more

The average 70 kg (150 lb) adult human body contains approximately 7 × 10 27 atoms and contains at least detectable traces of 60 chemical elements. About 29 of these elements are thought to play an active positive role in life and health in humans. read more

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