Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Q: There are three quarks in each proton and neutron.

A: How many quarks are in each proton and neutron?
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Q: Half-life property of carbon and other elements can be used to date fossils and rocks, among other things.

A: What property of carbon and other elements can be used to date fossils and rocks, among other things?
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Q: Its electon configuration makes nobel gases unreactive.

A:
What makes nobel gases unreactive?
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