Atomic radii of fluorine and neon in $$\mathop {\text{A}}\limits^ \circ $$ngstorm units are respectively given by
A.
$$0.72,1.60$$
B.
$$1.60,1.60\,$$
C.
$$0.72,0.72\,\,$$
D.
None of these values
Answer :
$$0.72,1.60$$
Solution :
TIPS/Formulae:
(i) Noble gases do not have covalent radii. They have only vander waal’s radii.
(ii) Covalent radii is always larger than corresponding van-der Waal’s radii.
Atomic radius of neon being van der Waal’s radius is
larger than that of fluorine which is in fact is its covalent radius
Releted MCQ Question on Inorganic Chemistry >> Classification of Elements and Periodicity in Properties
Releted Question 1
The correct order of second ionisation potential of carbon, nitrogen, oxygen and fluorine is