The natural abundance of chlorine-37 is approximately 24.23%.
The natural abundance of Br-81 is approximately 49.31%.
Copper has two stable isotopes, copper-63 and copper-65. The relative percentage abundance of these isotopes is approximately 69.17% for copper-63 and 30.83% for copper-65.
50.69% natural abundance
The natural abundance of Cl-35 is approximately 75.77%.
The abundance of N-15 is approximately 0.37% of natural nitrogen.
63Cu
The natural abundance of Ag-109 can be calculated by subtracting the natural abundance of Ag-107 (51.84%) from 100%, since these two isotopes make up 100% of all naturally occurring silver isotopes. Thus, the natural abundance of Ag-109 is 48.16%.
The natural abundance of lithium-6 is around 7.59%.
Ga-69 occurs in greater abundance, with a natural abundance of about 60.1%, compared to Ga-71, which has a natural abundance of about 39.9%.
The natural percent abundance of the heavier isotope of gallium, gallium-71, is approximately 39.892%.
In abundance.