# Problem: Chorline exists mainly as two isotopes 35Cl and 37Cl,a) Which is more abundant?b) How do you know?c) Compute the percentage of chlorine that is the 37Cl isotope.

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###### FREE Expert Solution

Isotopes represent atoms of an element that contain the same atomic number (same number of protons), but different mass numbers (different number of neutrons).

a. 35Cl is more abundant

b. The average atomic mass of Cl is 35.45 amu.

Since 35.45 amu is closer to the mass of 35Cl (35 amu) than 37Cl (37 amu), this means that 35Cl has a mass greater contribution to 35.45 as compared to 37Cl

We’re being asked to percent 37Cl. We can use the following equation:

where atomic mass = average atomic mass of the element and f.a. = fractional abundance of the isotope ###### Problem Details

Chorline exists mainly as two isotopes 35Cl and 37Cl,

a) Which is more abundant?

b) How do you know?

c) Compute the percentage of chlorine that is the 37Cl isotope.