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- Carbon - Carbon powder can be used to detect peoples fingerprints from a crime scene or diamonds
- Oxygen - We need the stuff to breath
- Calcium - used to prevent osteoporosis (weakening of the bones)
- helium - blown directly into party balloons to make them rise.
- Gold - to make jewelry
There is a few my science teacher told me there are many more.
If your older then grade 9 you may need a better answer XD hope this helps.
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