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The radius of ${}_{32}X$ nuclide is measured to be twice the radius of ${}_{4}^{9}B e$ . The number of neutrons in X is

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Correct option is A

radius of the nucleus is directly proportional A13 where A is the mass no of the element.r1r2=A1A213 then r1r23=A1A2as r1=2r2 8=A1A2=A19 A1=72 72= np+nn=30+nn no of neuron nn is 42

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The radius of X 32 nuclide is measured to be twice the radius of B 49e. The number of neutrons in X is

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The radius of ${}_{32}X$ nuclide is measured to be twice the radius of ${}_{4}^{9}B e$ . The number of neutrons in X is