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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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What is the difference between how ionic and covalent bonds form
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As an asteroid comes close to earth, it's name will change to? apex
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What would happen if the cell membrane were completely made of a polar substance?...
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