Q.
The van der Waal and covalent radii of fluorine atom
respectively from the following figure are.
1849
160
Classification of Elements and Periodicity in Properties
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Solution:
Covalent radius is radius of an atom in its bound
state i.e., in fluorine it is half of distance between two
covalently bonded fluorine atoms; van der Waal radii is
one-halfofthe distance between the nuclei oftwo identical
non-bonded isolated atoms. These atoms are attracted
toward each other through weak van der Waal’s force
hence van der Waal radii are very large.
