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what is the mass number for an atom of xenon containing 54 protons and 79 neutroms

Chem101 Question 9 of 16 What is the mass number for an atom of xenon containing 54 protons and 79 neutrons? +/- X 100 MacBoo
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Answer #1

Given:
Number of proton = 54
Number of neutron = 79

Use:
Mass number = Number of proton + Number of neutron
= 54 + 79
= 133

Answer: 133

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