Question

Arrange the following atoms in the order of increasing atomic radius.
F, Cl, C, O

• A. F, Cl, O, C
• B. C, O, F,Cl
• C. O, C, F, Cl
• D. F, O, C, Cl

Answer 1

The correct option is D F, O, C, Cl

As we move along a period from left to right, number of proton increases and valence shell remains same, so, radius of atom decreases.
Also, as we move down the group, number of valence shell increases, so, size of atom increases so order of radii is F < O < C < CI.