Multiple choice

Which of the following is a condition for existence of a radioactive element?

  1. The number of protons and neutrons are nearly equal.

  2. The number of protons exceeds much more than that of the neutrons.

  3. The number of neutrons exceeds much more than that of the protons.

  4. The number of protons exceeds much more than that of the electrons.

  5. The number of electrons exceeds much more than that of the neutrons.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

When the number of neutrons exceeds much than that of the protons in a nucleus, it becomes unstable or radioactive.

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