Assertion A: Metallic character decreases and non-metallic character increases on moving from left to right in a period.

Reason R: It is due to increase in ionisation enthalpy and decrease in electro

Question

Assertion A: Metallic character decreases and non-metallic character increases on moving from left to right in a period.

Reason R: It is due to increase in ionisation enthalpy and decrease in electron gain enthalpy, when one moves from left to right in a period.

Canvas Classes · Accepted Answer

Strategy:
 Review periodic trends in character. Across a period, atomic size decreases and  increases, favoring the gain of electrons (non-metallic) over their loss (metallic).

Step 1: Evaluate Assertion (A)
- Moving from left to right, elements find it harder to lose electrons as the nucleus pulls harder. This reduces metallic character.
- Simultaneously, they find it easier to gain electrons, increasing non-metallic character. (True)

Step 2: Evaluate Reason (R)
- It is true that  increases.

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