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NEET 2001 Chemistry question

ChemistryStructure of AtomNEET 2001

If a species emits firstly a positron, then two and two and at last one is also after intially it fainally convets into stable species so correct relation will be : -

Answer: (1)

Solution

Here is the mass number and the atomic number of X (as printed, ), and , are the mass number and atomic number of Y. Effects of each emission: positron (): mass number unchanged, atomic number decreases by 1; (): mass number , atomic number ;

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Question ID VK-088834