A. 99pm, 198pm
B. 198pm, 99pm
C. 198pm, 198pm
D. 99pm, 99m
The question was asked in homework.
This key question is from Bond Parameters in portion Chemical Bonding and Molecular Structure of Chemistry – Class 11
Explanation: The half of the distance between two covalently bonded similar atoms in the same molecule is called covalent radius, whereas the half of the distance between two similar atoms of different molecules in a solid is known as van der Waal’s radius. Therefore covalent radius is smaller than the van der Waal’s radius.