Xatom is isotonic to Y atom. The value of x is -
(A)8
(B)16
(C)9
(D)17
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Answer:
Isotonic are those species having same no. of neutrons.
No. of neutrons in Y = 17-9 =8
No. of neutrons in X = x - 8 =8 as X and y have same 8 neutrons.
Hence mass no. of X is 16 i.e. value of x.
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