Question

define 'radioactive' in a short and simple answer.

Answer 1

Explanation:

here is your answer

• Radioactivity is the spontaneous emission of radiation in the form of particles or high energy photons resulting from a nuclear reaction. ... A substance that contains unstable atomic nuclei is considered to be radioactive. Radioactive decay is a random or stochastic process that occurs at the level of individual atoms.

hope it's helpful for you ☺️

Answer 2

Answer:

radioactive is the spontaneous emissions of radiation in the form of particles or high energy photons resulting from a nuclear reaction...... I hope it's help you..........