Identify the elements X and Y using the ionisation energy values given below :
| Ionization energy (kJ/mol) | ||
|---|---|---|
| 1${st}$ | 2${nd}$ | |
| X | 495 | 4563 |
| Y | 731 | 1450 |
Solution
Due to 2p<sup>6</sup>, noble gas electronic configuration, the
second ionisation enthalpy of Na is very high. That’s
why has large difference between IE<sub>1</sub>, and IE<sub>2</sub><br><br>
Mg<sup>+</sup> is 2p<sup>6</sup>, 3s<sup>1</sup>.<br><br>
After the loss of one electron, Mg<sup>+</sup> will be formed
with noble gas electronic configuration. That’s why
has less difference between I.E<sub>1</sub> and I.E<sub>2</sub>, but it's I.E<sub>3</sub> is very high.
About this question
Subject: Chemistry · Chapter: Periodic Table and Periodicity · Topic: Periodic Trends
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