Question

Define the following terms :

1) Covalent radii
2) Metallic radii
3) Vander Waal's radii
4) Ionic radii


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Answer 1

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✍️ Covalent radii :- One half of the distance between the nuclei (internuclear distance) of two covalently bonded like atoms in a homodiatomic molecule is called the covalent radius of that atom.

✍️ Metallic radii :- Metal atoms are assumed to be closely packed spheres in the metallic crystal. These metal atom spheres are considered to touch one another in the crystal. One half of the inter nuclear distance between the two closest metal atoms in the metallic crystal is called metallic radius.

✍️ Vander Wall's radii :- One half of the distance between the nuclei of two adjacent atoms belonging to two neighbouring molecules of an element in the solid state is called Van der Wall's radius.

✍️ Ionic radii :- The ionic radii of the ions present in an ionic crystal may be calculated from the internuclear distance between the two ions.

❤️Hope it will help you.❤️

Answer 2

Answer:

CONVALENT RADII : it is used to define half of the distance between the closest approach of two non -bonded atoms of a given element.

METALLIC RADII : It is define as one half of the distance between two adjacent metal ion in the mettaliclattice .

VANDEE WAAL'S RADII : It is define as half of the inter nuclear sepration of two non -bonded atom of the same element in their closest possible approach .

IONIC RADII : It is the half of the distance between two ions that barely touching each other .