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OpenStudy (beccab003):
Can someone check my answer please? An isotope of zinc has 30 protons and 34 neutrons. What is the mass number of this isotope of zinc? 30 34 64 60 I think it is 64. Medal to best answer. Thanks!
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OpenStudy (cuanchi):
You are correct, the medal is for you
OpenStudy (jfraser):
@Cuanchi is correct, since mass # (A) is always equal to the number of protons plus neutrons
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