Chlorine Has Two Naturally Occurring Isotopes

question 49

Multiple Choice

Chlorine has two naturally occurring isotopes. The isotope Cl-35 (mass = 35.0 amu) makes up 75.8% of the sample, and the isotope Cl-37 (mass = 37.0 amu) makes up 24.2% of the sample. What is the average atomic
Mass for chlorine?

• A)36.6 amu
• B)35 amu
• C)36.0 amu
• D)35.521 amu
• E)35.5 amu

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