Question

Atoms with certain characteristics are radioactive. Which is least likely to be radioactive? O A. all atoms with an atomic number over 83 B. all atoms with twice as many neutrons as protons C. all atoms with an atomic number under 40 O D. all atoms with half as many neutrons as protons​

Answer 1

Answer:

The answer an be the option A.

Explanation:

Because radioactive substances have atomic number greater than 82.