Atomic radius of Fe is closest to

The atomic radius of cd is closest to :

The atomic radius of Nb is closest to :

The atomic radius of Cd is closest to :

The atomic radius of Nb is closest to :

The radius of which is closest to that of the Li^(+) ions?

The radius of which is closest to that of the Li^(+) ions?

Two gases-argon (atomic radius 0.07 nm, atomic weight 40) and xenon (atomic radius 0.1 nm, atomic weight 140) have the same number density and are at the same temperature. The ratio of their respective mean free times is closest to :