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In this lesson, we will discuss the examples and types of isotopes. These twins have the same temperament, and since they're identical, it is very hard to tell them apart unless you examine them closely.When it is time for their annual physical, the twins need to step on a weighing scale, and when they do, one weighs slightly more than the other.Cosmogenic isotopes are formed when the atmosphere reacts with the rays emitted from stars or when geological materials on the Earth's surface are irradiated by cosmic rays directly.
Examples of long-lived radioactive isotopes include potassium-40, rubidium-87 and uranium-238.
Anthropogenic isotopes are man-made or result from human activities, such as testing weapons and processing nuclear fuels.
These isotopes are useful in the fields of oceanography and hydrology since they can be used to study flow, currents and sedimentation rates.
Looking at the percentages below each carbon isotope, we see that almost 98.9% of the carbon that is found is in the form of carbon-12.
The least abundant form of carbon is carbon-14, with an abundance of less than 0.0001%.