Question

In which of the following, elements are correctly arranged in the decreasing order of atomic radius?

• A. Cl> Si> C$>$ F
• B. Si$>$ Cl$>$ C$>$ F
• C. Si$>$ C$>$ F$>$ Cl
• D. C$>$ Si$>$ F$>$ Cl

Hint:

Across a period, atomic radius decreases. Down a group, atomic radius increases.

Answer 1

The Correct Option is B

Atomic radius generally decreases across a period (left to right) and increases down a group. - Si (Group 14, Period 3)> Cl (Group 17, Period 3)> C (Group 14, Period 2)> F (Group 17, Period 2)