Question Detail
Question
The stable isotope of sodium is ²³Na. What kind of radioactivity would you expect of ²⁴Na?
Correct Answer
Option B is the correct answer.
Detailed Explanation
²⁴Na has more neutrons than the stable isotope ²³Na. It will undergo β⁻ decay to convert a neutron into a proton, moving towards the line of stability.
Hint
Isotopes with excess neutrons tend to undergo beta-minus decay.