Question

define atomic radius​

Answer 1

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The atomic radius is defined as one-half the distance between the nuclei of identical atoms that are bonded together.The atomic radius (r) of an atom can be defined as one half the distance (d) between two nuclei in a diatomic molecule.

Answer 2

Answer

The atomic radius of a chemical element is a measure of the size of its atoms, usually the mean distance from the center of the nucleus to the boundary of the surrounding shells of electron.

Its SI unit is picometers.