Chlorine has two isotopes $^{35}Cl$ and $^{37}Cl$ with an average atomic mass of $35.5$. What is the ratio of their relative abundance respectively?
- A$1:1$
- B$2:1$
- C$1:3$
- D$3:1$
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|---|---|---|
| $^{35}Cl$ | $75.77$ | $34.9689$ |
| $^{37}Cl$ | $24.23$ | $36.9659$ |
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