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ConcepTest: Isotope Mass and Atomic Number

ConcepTest: Isotope Mass and Atomic Number

The isotope of element X has 15 protons, 17 neutrons, and 15 electrons. The element has an atomic number of ____ and a mass number of ____. a. 15; 32 b. 17; 15 c. 17; 47 d. 15; 30

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