There are two stable isotopes of chlorine: chlorine-35, with a mass of 34.968853 amu; and chlorine-37, with a mass of 36.965903. Given that the average atomic mass of a chlorine atom is 35.45 amu, which of the following statements is true?
A) Chlorine contains almost exclusively $~{}_{17}^{35}\text{Cl}$ with very little$~{}_{17}^{35}\text{Cl}$
B) Chlorine contains more$~{}_{17}^{35}\text{Cl}$ than$~{}_{17}^{35}\text{Cl}$.
C) Chlorine contains roughly equal amounts of$~{}_{17}^{35}\text{Cl}$ and$~{}_{17}^{35}\text{Cl}$
D) Chlorine contains more$~{}_{17}^{35}\text{Cl}$ than$~{}_{17}^{35}\text{Cl}$
E) Chlorine contains almost exclusively of $~{}_{17}^{35}\text{Cl}$, with very little $~{}_{17}^{35}\text{Cl}$.

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The Answer of There are two stable isotopes of chlorine: chlorine-35, with a mass of 34.968853 amu; and chlorine-37, with a mass of 36.965903. Given that the average atomic mass of a chlorine atom is 35.45 amu, which of the following statements is true?
A) Chlorine contains almost exclusively $~{}_{17}^{35}\text{Cl}$ with very little$~{}_{17}^{35}\text{Cl}$
B) Chlorine contains more$~{}_{17}^{35}\text{Cl}$ than$~{}_{17}^{35}\text{Cl}$.
C) Chlorine contains roughly equal amounts of$~{}_{17}^{35}\text{Cl}$ and$~{}_{17}^{35}\text{Cl}$
D) Chlorine contains more$~{}_{17}^{35}\text{Cl}$ than$~{}_{17}^{35}\text{Cl}$
E) Chlorine contains almost exclusively of $~{}_{17}^{35}\text{Cl}$, with very little $~{}_{17}^{35}\text{Cl}$.

There Are Two Stable Isotopes of Chlorine: Chlorine-35, with a Mass