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The identities of substances are the same before and after which type of change
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Choose all the answers that apply. fluorine (f) has an atomic number of 9 and an atomic weight of 18.99. fluorine has a. 9 protons b. 10 neutrons c. 18 electrons d. an atomic mass of 19 e. at least one isotope
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Chemistry, 23.06.2019 04:31
Chemical engineering who specializes in negotiating for large purchases and instructing customers in use of the products are
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