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

| | 1st IE | 2nd IE |
|---|---|---|
| X | 495 | 4563 |
| Y | 731 | 1450 |

Question

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

| | 1st IE | 2nd IE |
|---|---|---|
| X | 495 | 4563 |
| Y | 731 | 1450 |

Canvas Classes · Accepted Answer

Strategy:
 Use ionization energy jumps to identify groups. A massive jump from  to  indicates a Group 1 element (forming noble gas config after one loss). A smaller jump indicates Group 2.

Step 1: Analyze Element X
- , .
- The ratio  is . This jump signifies that the second electron is removed from a noble gas core. X is in Group 1 (Sodium, ).

Step 2: Analyze Element Y
- , .
- The ratio  is . This is a normal increase for a Group 2 element where both electrons are from the valence shell. Y is

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