Carbon-14, tritium, and Iodine-125 are all what type of element?

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Multiple Choice

Carbon-14, tritium, and Iodine-125 are all what type of element?

Explanation:
These are all radioisotopes—radioactive forms of elements. Carbon-14, tritium (hydrogen-3), and iodine-125 are different isotopes of carbon, hydrogen, and iodine, and each has a nucleus that undergoes radioactive decay. That property—radioactivity—is what defines them in this context, not their state as a compound, waves, or macromolecules. They can be part of organic molecules or used in medicine and research as tracers, but what ties them together here is that they are radioactive isotopes with varying decay types, energies, and half-lives.

These are all radioisotopes—radioactive forms of elements. Carbon-14, tritium (hydrogen-3), and iodine-125 are different isotopes of carbon, hydrogen, and iodine, and each has a nucleus that undergoes radioactive decay. That property—radioactivity—is what defines them in this context, not their state as a compound, waves, or macromolecules. They can be part of organic molecules or used in medicine and research as tracers, but what ties them together here is that they are radioactive isotopes with varying decay types, energies, and half-lives.

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