Question

what is atomic radius and ionic radius

Answer 1

Atomic radius is the distance between the nucleus and valency shell (Last shell) of the atom.Atomic radius varies from one element to another element.Ionic radius the distance between nucleus and valency shell of formed ion.In Cations Atomic radius decreases than original atom.In Anions, The Atomic radius remains same.

Answer 2

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The atomic radius of a chemical element is a measure of the size of its atoms, usually the mean or typical distance from the center of the nucleus to the boundary of the surrounding shells of electrons. ... Electrons do not have definite orbits, or sharply defined ranges