Question

Radioactivity is defined as a phenomenon in which certain _______________ disintegrate by emitting certain invisible radiations.

Answer 1

Explanation:

• Radioactivity is defined as a phenomenon in which certain heavy and unstable atomic nuclei spontaneously disintegrate by emitting certain invisible radiations.
• Radioactive elements are elements that transmute into other elements by decaying various types of fundamental particles such as alpha and beta particles.
• In this phenomenon, several nuclear particles such as protons are ejected in different ways from the unstable heavy atomic nuclei to transmute into stable atomic nuclei.
• Radioactive elements are extremely hazardous as radioactivity interferes with biological life and causes severe harm to them.
• Here is an example of a radioactive reaction:
• ${}_{92}{}^{238}U\to {}_{90}{}^{234}Th+{}_2{}^{4}He$

Thus, Radioactivity is defined as a phenomenon in which certain heavy and unstable atomic nuclei spontaneously disintegrate by emitting certain invisible radiations.