The single covalent radius of $P$ is $0.11 \ nm$. The single covalent radius of $Cl$ will be

The unit representing atomic radii and ionic radii is

On moving down a group of representative elements,both atomic and ionic radii increase with an increase in:

Mark the smallest atom among the following:

The ionic radii $(\mathring{A})$ of $C^{4-}$ and $O^{2-}$ respectively are $2.60$ and $1.40$. The ionic radius of the isoelectronic ion $N^{3-}$ would be........$\mathring{A}$

Identify the correct order in which the covalent radius of the following elements increases: $(I) \ Ti, (II) \ Ca, (III) \ Sc$.