Which of the following is true for a sample o | vedclass

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(C) Isotopes are atoms of the same element that have the same number of protons and electrons but a different number of neutrons.For $U^{235}$: Atomic

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Both have the same number of protons and electrons,but $U^{238}$ has three more neutrons than $U^{235}$.

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(C) Isotopes are atoms of the same element that have the same number of protons and electrons but a different number of neutrons.For $U^{235}$: Atomic number $(Z)$ = $92$,Mass number $(A)$ = $235$. Number of neutrons $(N)$ = $A - Z = 235 - 92 = 143$.For $U^{238}$: Atomic number $(Z)$ = $92$,Mass number $(A)$ = $238$. Number of neutrons $(N)$ = $A - Z = 238 - 92 = 146$.Comparing the two,both have $92$ protons and $92$ electrons. The difference in the number of neutrons is $146 - 143 = 3$.Therefore,$U^{238}$ has three more neutrons than $U^{235}$.

Which of the following is true for a sample of $U^{235}$ and $U^{238}$ isotopes?

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