A less common isotope, iodine-125, is sometimes used to treat cancerous tissue.

Stable Ge is the most common isotope, having a natural abundance of approximately 36%.

For example, a common isotope of the element carbon is carbon-14.

The most common isotope of an element is the one represented at the periodic table.

The table below summarizes the abilities of common isotopes to form fallout.

The decline in luminosity is also much faster than we'd expect based on half lives of the common isotopes.

Molybdenum-98 is the most common isotope, comprising 24.14% of all molybdenum on Earth.

The most common isotope in nature is 3Li which makes up 92.58 % of the total.

It is the most common isotope of helium in the universe.

On Earth, it is the most common isotope of helium.