1. Tardigrade
  2. Question
  3. Chemistry
  4. Which one of the following has the lowest ionization energy?

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. Which one of the following has the lowest ionization energy?

WBJEEWBJEE 2011Classification of Elements and Periodicity in Properties

Solution:

In the Periodic Table, the minimum ionisation energy is found at alkali metals. Hence sodium (electronic configuration $\left.=1 s^{2} 2 s^{2} 2 p^{6} 3 s^{1}\right)$ has the lowest ionisation energy.
Note : - Ionisation energy is the amount of energy required to remove an electron from the outermost shell an isolated atom.