A: Atomic radii decreases in a period upto halogen.
R : van der Waal radii of Cl is larger than its covalent radii.
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Answer:
HEY!
Explanation:
AS WE GO TO RIGHT SIDE ATOMIC RADIUS DCRZZ BCZ AN EXTRA ELECTRON IS ADDED TO SAME SHELL ..SO INTERATION BETWEEN NUCLEUS ND ELECTRON GET STRONGER SO THATS WHY RADIUS DCRZZ.
VANDERVALLS RADII OF CL IS LARGER THAN ITS COV RADII BCZ THESE FORCES ARE MXH WEAKER THEN FORCES OPERATING BETWEEN COVALENTLY BONDED MOLECULE..
HOPE IT HELPS U!
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