Identify the elements X and Y using the ionisation energy values given below:

Question:

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

  1. $\mathrm{X}=\mathrm{Na} ; \mathrm{Y}=\mathrm{Mg}$

  2. $\mathrm{X}=\mathrm{Mg} ; \mathrm{Y}=\mathrm{F}$

  3. $\mathrm{X}=\mathrm{Mg} ; \mathrm{Y}=\mathrm{Na}$

  4. $\mathrm{Y}=\mathrm{F} ; \mathrm{Y}=\mathrm{Mg}$


Correct Option: 1

Solution:

$\mathrm{Na} \rightarrow[\mathrm{Ne}] 3 \mathrm{~s}^{1} \mathrm{IE}_{1}$ is very low but $\mathrm{IE}_{2}$ is very

high due to stable noble gas configuration of $\mathrm{Na}^{+}$

$\mathrm{Mg} \rightarrow[\mathrm{Ne}] 3 \mathrm{~s}^{2} \mathrm{IE}_{1} \& \mathrm{IE}_{2} \rightarrow$ Low

$E_{3}$ is very high.

Leave a comment

Close

Click here to get exam-ready with eSaral

For making your preparation journey smoother of JEE, NEET and Class 8 to 10, grab our app now.

Download Now