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natural or artificial substance that cannot be broken down into simpler substances by physical or chemical means. Element Matter Isotope Ion an atom that gains or loses an electron. Element Matter Isotope lon
    natural or artificial substance that cannot be broken down into simpler substances by physical or chemical means. Element Matter Isotope Ion an atom that gains or loses an electron. Element Matter Isotope lon - 化学 Solution | KnowBuddy | KnowBuddy - Best AI Homework Helper for All Subjects