1. Tardigrade
  2. Question
  3. Chemistry
  4. Identify the elements X and Y using the ionisation energy values given below: <img class=img-fluid question-image alt=image src=https://cdn.tardigrade.in/img/question/chemistry/3839590d714a6eccd3522ca3346deb08-.png />

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. Identify the elements $X$ and $Y$ using the ionisation energy values given below:
image

JEE MainJEE Main 2021Classification of Elements and Periodicity in Properties

Solution:

$Na \rightarrow[ Ne ] 3 s ^{1} IE _{1}$ is very low but $IE _{2}$ is very high due to stable noble gas configuration of $Na ^{+}$

$Mg \rightarrow[ Ne ] 3 s ^{2} IE _{1} \& IE _{2} \rightarrow$ Low $IE _{3}$ is very high.