mrzikoooooooo8714 mrzikoooooooo8714

27-04-2018
Chemistry

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What is the atomic number f plus the atomic number of na equals the atomic number of this element?

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ckayep0cx2v ckayep0cx2v

03-05-2018

calcium; atomic # of fluorine is 9 and atomic # of sodium is 11 - atomic number of calcium in 20

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