Which one of the following statements is corr | vedclass

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(A) Statement $A$ is correct: The nuclear radius $R$ is related to the mass number $A$ by the formula $R = R_0 A^{1/3}$,where $R_0 \approx 1.2 	imes

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The radius $(R)$ of a nuclide of mass number $A$ is given by the equation $R = R_0(A)^{1/3}$ (where $R_0$ is a constant)

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(A) Statement $A$ is correct: The nuclear radius $R$ is related to the mass number $A$ by the formula $R = R_0 A^{1/3}$,where $R_0 \approx 1.2 	imes 10^{-15} \ m$.Statement $B$ is incorrect: Isobars are atoms with the same mass number but different atomic numbers. ${ }_{7}N^{15}$ and ${ }_{8}O^{16}$ have different mass numbers.Statement $C$ is incorrect: The end product of the thorium $(4n)$ series is ${ }_{82}Pb^{208}$. Wait,this is actually correct. Let us re-evaluate.Actually,all statements $A$,$C$,and $D$ are scientifically correct. However,in the context of standard nuclear chemistry questions,$A$ is the most fundamental definition.Re-evaluating $D$: ${ }_{20}Ca^{40}$ has $Z=20$ and $N=20$. Both $20$ are magic numbers $(2, 8, 20, 28, 50, 82, 126)$. Thus $D$ is also correct.Given the multiple correct statements,$A$ is the most universally cited textbook definition.

Which one of the following statements is correct?

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