Which of the following has an isotopic number | vedclass

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(D) The isotopic number or neutron number $(N)$ is calculated as $N = A - Z$,where $A$ is the mass number and $Z$ is the atomic number.For $_{13}^{27}

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(D) The isotopic number or neutron number $(N)$ is calculated as $N = A - Z$,where $A$ is the mass number and $Z$ is the atomic number.For $_{13}^{27}Al$,$N = 27 - 13 = 14$.For $_{3}^{7}Li$,$N = 7 - 3 = 4$.For $_{4}^{9}Be$,$N = 9 - 4 = 5$.For $_{5}^{11}B$,$N = 11 - 5 = 6$.None of the given options have a neutron number equal to $14$. However,if the question implies the ratio of neutrons to protons or another property,it is not standard. Given the options,none match the neutron count of $14$.

Which of the following has an isotopic number (neutron number) equal to that in $_{13}^{27}Al$?

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