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OpenStudy (fancysharkk):
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OpenStudy (fancysharkk):
OpenStudy (fancysharkk):
@Directrix Can you help ?
OpenStudy (sapphiremoon):
Always check the protons firs.t 40 protons makes it zirconium, which eliminates two answer choices. The second part is the mass number, which is the sum of the protons and neutrons. What do you think that number is?
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