Calculate the radius of the largest atom that could be inserted into an interstitial position in si without causing any distortion. assume that all of the atoms can be treated as touching hard spheres and take the radius of si atoms to be rsi. indicate where in the si lattice such as interstitials would be located. now calculate the radius of the largest atom that could be inserted into an interstitial position in an fcc structure with touching hard sphere atoms of the same radius, rsi.

2b2t

explanation:

2b2t

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c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.