Given below are two statements:

Statement I: The radii of isoelectronic species increases in the order:

Statement II: The magnitude of electron gain enthalpy of halogen decreases in the order:

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Question

Given below are two statements:

Statement I: The radii of isoelectronic species increases in the order:

Statement II: The magnitude of electron gain enthalpy of halogen decreases in the order:

Choose the most appropriate answer:

Canvas Classes · Accepted Answer

Strategy:
 Evaluate the size trend for isoelectronic species and the Electron Gain Enthalpy () anomaly in halogens.

Step 1: Evaluate Statement I
- Ions: . All have 10 electrons.
- Nuclear charges (): .
- Size . Thus, . (Correct)

Step 2: Evaluate Statement II
- For halogens, magnitude decreases as: . (Correct)

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