Question

If an internuclear distance between A atoms in A, is 10A and between B atoms in B, is 6A, then calculate the internuclear distance between A and B in A. [Electronegativity difference between A and B has negligible value].

Answer 1

Here electronegativity difference between 'A' and 'B' has negligible value. So there is no consideration of pulling electron pair and reducing bond length. Internuclear distance between 'A' atoms is 10A'. So atomic size is half of it. So, '5A'. Similarly in'B', atomic size is '5A' Similarly in 'B' , atomic size is '3A'. If they both combine, then the resultant internuclear distance in AB is 5A+3A =8A.