The atomic radius of molybdenum (Mo) is approximately 139 picometers (pm) or 1.39 Ångströms (Å). Atomic radius refers to the average distance from the nucleus to the outermost electron shell of an atom in a crystalline lattice.

It's important to note that atomic radii can vary slightly depending on the coordination number, oxidation state, and bonding environment of the atom. The value provided is a general approximation for molybdenum under standard conditions.