Question

II) Noncovalent Forces – The following questions refer to the chart below which shows the boiling points of specific compounds containing only H-E bonds, where E stands for elements in various periods and groups. 150 a) Explain the steady increase in boiling points in going from Period 3 to Period 5 elements. H20 100 50 HE Boiling point (°C) H2Te 0 SbH3 HI NH3 H2Se -50 H2S b) Explain the sharp decrease in boiling points in going from Period 2 to Period 3 elements. Asha HCI HBO -100 PH3 Group 17 Group 16 Group 15 -150 2 3 4 5 Period c) Do you expect melting points to necessarily follow the same trends? Why or why not?