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Q. A radioactive element ${ }_{92}^{222} X$ emits two $\alpha$-particles, one electron and two positrons. The product nucleus is represented by ${ }_p^{2 34} Y$. The value of $P$ is ___

JEE MainJEE Main 2023Nuclei

Solution:

$ P=92-2-2+1-1-1 $
$ P=92-5 $
$ P = 8 7$