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if the atomic number of a noble gas is Z, the atomic number of a halogen is Z+7 and the atomic number of an alkali metal is Z+17, what does Z equal to
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Match the formula for the following compound: magnesium sulfate heptahydratemgs·7h2omg2so4·7h2omg(so4)2·7h2omgso4·7h2o
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if the atomic number of a noble gas is Z, the atomic number of a halogen is Z+7 and the atomic numbe...
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