Question

Define Van der waals radii,covalent radii and Ionic radii.

Answer 1

atomic radii is that the distance between nucleus and the outer most shell

vander Waals radii is that half of the internuclear distance between two atoms of different molecules which are very close to each other in solid state due to Van der Waals forces .

covalent radii is that half of the internuclear distance between two atoms held together by a covalent bond .

Ionic radii is that the distance between the nucleus and the outermost shell of an ion

Answer 2

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Van der Waals radius: It is half of the distance between two similar atoms in a separate molecule in a solid. -Ionic radius: A neutral atom charges to a cation by the loss of one or more electrons and an anion by the gain of one or more electrons.