which radioisotope is used as a tracer in nuclear scanning?\ncarbon -14\nuranium-238\ntechnetium-99m\niodine…

Brief Explanations:

Technetium - 99m is a commonly used radioactive tracer in nuclear scanning due to its favorable nuclear properties like short - half life and appropriate energy of gamma emissions for detection. Carbon - 14 is used more in dating, uranium - 238 is mainly related to nuclear fuel and decay chains, and iodine - 129 has different applications mainly in environmental and nuclear waste studies.

Answer:

technetium-99m