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The letters X, Y and Z represent different atoms.What can be deduced from the proton numbers and nucleon numbers of X, Y and Z?

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The letters X, Y and Z represent different atoms.<br><img src='https://www.fatskills.com/images3/olympiad/class-9-science-3-13.GIF'><br>What can be deduced from the proton numbers and nucleon numbers of X, Y and Z?






 
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