Question

The correct order of atomic radii of N, F, Al, Si is:

• A. \( F>N>Si>Al \)
• B. \( F>N>Al>Si \)
• C. \( Al>Si>F>N \)
• D. \( Al>Si>N>F \)

Hint:

Atomic radius increases down a group and decreases across a period due to increasing nuclear charge.

Answer 1

The Correct Option is D

Step 1: Periodic Trends of Atomic Radius - Across a period: Atomic radius decreases. - Down a group: Atomic radius increases. Step 2: Apply the Trends - \( N \) and \( F \) are in the same period, but \( F \) has a smaller radius. - \( Si \) and \( Al \) are in the same period, but \( Al \) has a slightly larger radius. - Down the group, radius increases. Step 3: Correct Order \[ Al>Si>N>F \]