Question:
The correct order of atomic radii of C, Al and S is
The correct order of atomic radii of C, Al and S is
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Across a period: atomic radius decreases. Down a group: atomic radius increases.
Updated On: Jun 4, 2025
C<Al<S
S<Al<C
Al<S<C
C<S<Al
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The Correct Option is D
Solution and Explanation
Atomic radius increases down a group and decreases across a period.
- C and S are in the same period (Period 2 and 3 respectively), and S is to the right of Al.
- Al is in Group 13 (Period 3), S in Group 16 (Period 3), and C in Group 14 (Period 2).
So, the correct order based on periodic trend is:
- C and S are in the same period (Period 2 and 3 respectively), and S is to the right of Al.
- Al is in Group 13 (Period 3), S in Group 16 (Period 3), and C in Group 14 (Period 2).
So, the correct order based on periodic trend is:
C<S<Al
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