1. Tardigrade
  2. Question
  3. Chemistry
  4. Which of the following atoms has the highest first ionization energy ?

Q. Which of the following atoms has the highest first ionization energy ?

 3467  207 JEE MainJEE Main 2016Classification of Elements and Periodicity in Properties Report Error

Solution:

Element Ionisation energy (kJ/mol)
Na 496
K 419
Rb 403
Sc 631

Scandium has the highest first Ionisation energy.