1. Tardigrade
  2. Question
  3. Chemistry
  4. The first ionisation energies of magnesium and aluminium are respectively given by

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. The first ionisation energies of magnesium and aluminium are respectively given by

NTA AbhyasNTA Abhyas 2020Classification of Elements and Periodicity in Properties

Solution:

$IE$ of $Mg>IE$ of $Al$

Electronic configuration of

$\text{Mg}=1\text{s}^{2},2\text{s}^{2},2\text{p}^{2},3\text{s}^{2}$

$\text{Al}=1\text{s}^{2},2\text{s}^{2},2\text{p}^{6},3\text{s}^{2},3\text{p}^{1}$

$Mg$ has stable configuration (fulfilled) than $Al$ so removal of an electron is difficult hence, required more energy i.e. more ionisation energy.