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

Q: Compounds with metals and nonmetals sharing electrons are known as ions kinds of compounds.

A: Compounds with metals and nonmetals sharing electrons are known as what kinds of compounds?
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Q: Radioactive decay can give off energy and particles.

A: Radioactive decay can give off energy and what else?
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Q: If the dna from all 46 chromosomes in a human cell nucleus was laid out end to end, it would measure approximately two meters long.

A:
If the dna from all 46 chromosomes in a human cell nucleus was laid out end to end, it would measure approximately how long?
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