Question

Which of the highlighted chemical bonds in the molecules below is longest? Shortest? In between? Which highlighted bond requires the highest energy to break? Lowest? In between? Answer these questions by completing the second and third columns in the table.

energy of highlighted bond length of highlighted bond compound Н Н—с—н - choose one - choose one - * 1 (highest) Н 2 3 (lowest) Н— Ge — н - choose one - - choose one - Н Н— Si — H - choose one choose one - 4 Н HIGH

Answer 1

In Group elements are C, Si, Ge, sn, pb, fl 6 14 32 50 82 114 Electronic com pigurations alle c-6- 15 28 28 15 25'2p² So- 14 15 25 2p 35 36 excited as 3p3 10 v Ge Ge- 32 15 25 2p 3s 3p 45 3d up2 excited slate us up from carbon to Germinium atomic size increases. with the increase of atomic size Effectivenu clear charge on electrons. in outermost orbital decreases. a so bond strength a decreases from Carbon to Gpominium. Due to d increase in atomic size, length of the bonds are also increased .

High energy 15 Deeded break- Shortest H -st - wealus band H Longest 1 Energy ef compound Length of bond bend D highest -C-H ( 13 Lowest / 3D Lowest Ge H o highest -S-H os increases & decrease increases simply ip size op bonded atomo Inc 7 strength of that bords der Length of that bonds incoe