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Biology, 21.06.2019 23:00
The circles, or orbits, for electrons are called energy levels. each level can hold only a certain number of electrons. add electrons to each level until you can't add any more. how many electrons can each level hold?
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Which of the following particles always has a positive charge? a. electronb. neutron c. proton d. ion
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Biology, 22.06.2019 17:00
The part of the eye that closes and opens to let light in is .
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In pea plants, the allele for green pods is dominant over the allele for yellow pods. A plant that i...
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