Radioactive Isotopes

At a glance

Learn about different types of radioactive isotopes.

Red-orange colored glowing radioactive symbol

Radioactive Isotopes

Close-up shot of the periodic table with the element Americium highlighted in a white box

Americium-241

Americium-241 (Am-241) is a manmade metal found in the environment in the form of microscopic dust.
Graphic displaying the word "Cesium 137" in neon blue font

Cesium-137

Cesium-1137 (Cs-137) is produced by nuclear fissions for use in medical devices and gauges.
Graphic displaying the word "Cobalt 60" in neon blue font

Cobalt-60

Cobalt-60 (Co-60) is a metal that is used medically for radiation therapy.
Close-up shot of the periodic table with the element Iodine highlighted in a white box

Iodine-131

Iodine-131 (I-131) is produced commercially to diagnose and treat cancers of the thyroid gland.
Close-up shot of the periodic table with the element Iridium highlighted in a white box

Iridium-192

Iridium-192 (Ir-192) is a manmade radioactive element used in medicine and industrial gauges.
Close-up shot of the periodic table with the element Plutonium highlighted in a white box

Plutonium

Plutonium is created from uranium in nuclear reactors.
Graphic displaying the word "Strontium 90" in neon blue font

Strontium-90

Strontium-90 (Sr-90) is a soft metal that is used as a power source.
Close-up shot of the periodic table with the focus on the element Uranium.

Uranium-235 (U-235) and Uranium-238 (U-238)

Uranium (U-235 and U-238) is a heavy metal that is naturally occurring in the environment.
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Content Source:
National Center for Environmental Health