Of the following,the one with the largest size is:

Given two statements below :
Statement $I:$ In $Cl_2$ molecule the covalent radius is double of the atomic radius of chlorine.
Statement $II:$ Radius of anionic species is always greater than their parent atomic radius.
Choose the most appropriate answer from options given below :

The ionic radii of $F^{-}$ and $O^{2-}$ respectively are $1.33 \ \mathring{A}$ and $1.40 \ \mathring{A}$,while the covalent radius of $N$ is $0.74 \ \mathring{A}$. The correct statement for the ionic radius of $N^{3-}$ from the following is:

Arrange $K^{+}$,$Cl^{-}$,$S^{2-}$,and $Ca^{2+}$ in decreasing order of their ionic radii with an explanation.

Which group elements have the smallest atomic radii in their respective periods?

The ionic radius of $Na^{+}$ ions is $1.02 \ \mathring{A}$. The ionic radii (in $\mathring{A}$) of $Mg^{2+}$ and $Al^{3+}$,respectively,are