Question

what is the unit of atomic size???​

Answer 1

Answer:

angstrom units

Typical atomic radii have values of about one or two angstrom units. (One angstrom, 1 Å, equals 10−10 metre.)

Answer 2

Answer:

The atomic radius (r) of an atom can be defined as one half the distance (d) between two nuclei in a diatomic molecule. Atomic radii have been measured for elements. The units for atomic radii are picometers, equal to 10−12 meters.