thanks very much thanks . . . bundle of thanks for replying gently . . . "Naqash Fatima" i will ever remain thankful to you i also appreciate your reply about third question . . .
after thinking a lot. . . i understand that ans about question one {C::C}?
bond length decreases as bonds are formed single, double or triple if fourth will be formed that their nucleus may collide but i may be wrong . . .
as about my second question that as we know that electron revolve around nucleus in their fixed paths Shells but how they revolve after formation of bond? but i appreciate reply of "candidGuy"