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Ionic Radii:

The distance from the center of the nucleus and the outer most shell (valence shell) of an ion.

Covalent Radii:

It is one half of the distance between two same nucleur atoms. In hetro nucleur di atomic atoms it is equal to the sum of the two atomic radii.

Atomic Radii:

The distance from the center of the nucleus and the outer most (valence) shell of an atom.

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14y ago
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14y ago

Covalent Radius: It is average of length between the nucleus of two atoms joint with a covalent bond.

Suppose, there are two H atoms joint with covalent bonds forming an H2 atom. The covalent radius will be the average distance between the nucleus of the two Hydrogen atoms.

Metallic Radius: It is the radius of any metallic element. For instance, the radius of one atom of Zinc, copper, gold, Calcium or any other metal will be called the its metallic radius.

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Q: What is the difference between ionic and covalent and atomic radii?
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