Question

Determine the relative abundance of the two isotopes of chlorine.

• A. $50$% for $Cl-35$ and $50$% for $Cl-37$
• B. $67$% for $Cl-35$ and $23$% for $Cl-37$
• C. $77.5$% for $Cl-35$ and $24.23$% for $Cl-37$
• D. $22.5$% for $Cl-35$ and $77.5$% for $Cl-37$

Answer 1

The correct option is C $77.5$% for $Cl-35$ and $24.23$% for $Cl-37$

The element of chlorine has 2 isotopes which are $Cl-35$ and $Cl-37$
Now $Cl-35$ has $75.78\%$ abundance and $Cl-37$ has $24.22\%$ abundance.
Thus option C.