which phrase describes one characteristic of radioactive elements? are produced in a laboratory decay at a…

which phrase describes one characteristic of radioactive elements? are produced in a laboratory decay at a constant rate have a consistent number of particles release energy and particles to maintain radioactivity
Answer
Brief Explanations:
Radioactive elements undergo radioactive decay at a constant rate, which is characterized by their half - life. Not all are produced in a lab, their particle numbers change during decay, and they release energy and particles as they decay, not to maintain radioactivity but as a result of it.
Answer:
decay at a constant rate