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Are atoms mostly empty space?

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Atoms are mostly empty space, but the human body contains 7 octillion atoms. Each atom contains material created billions of years ago. The body is mostly made up of water and contains more bacterial cells than actual cells. The brain requires 20% of the body’s oxygen supply.

It is true that atoms are mostly empty space. Indeed, if all the space from the atoms of the body were eliminated, the residual result would be so small that the body could fit into an opening that is less than 1/500 of a centimeter, or the point of a pin. Although atoms are small and made up of empty space, they are numerous; the average adult human body is estimated to contain 7 octillion (or 7 followed by 27 zeros) of individual atoms. Each atom is believed to contain material created billions of years ago. For example, hydrogen is thought to be almost 14 billion years old and oxygen was created about 12 billion years ago.

Read more about the structure of the human body:

The human body is thought to contain 10 times more bacterial cells than the actual cells that make up the body.
60% of the human body is made up of water, which contains hydrogen and oxygen molecules.
Although the brain makes up only 2% of the total human body, it requires at least 20% of the body’s entire oxygen supply.

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