3.18—And explain the shapes of, and bond angles in, BeCl2, BCl3, CH4, NH3, NH4+, H2O, CO2, gaseous PCl5, SF6 and C2H4

Know and explain the shapes of, and bond angles in, BeCl2, BCl3, CH4, NH3, NH4+, H2O, CO2, gaseous PCl5, SF6 and C2H4.

Use —and explain the shapes of, and bond angles in, becl2, bcl3, ch4, nh3, nh4+, h2o, co2, gaseous pcl5, sf6 and c2h4 to connect the rule to the data and decision in the question.

This matters because —and explain the shapes of, and bond angles in, becl2, bcl3, ch4, nh3, nh4+, h2o, co2, gaseous pcl5, sf6 and c2h4 determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply —and explain the shapes of, and bond angles in, becl2, bcl3, ch4, nh3, nh4+, h2o, co2, gaseous pcl5, sf6 and c2h4 to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: —And explain the shapes of, and bond angles in, BeCl2, BCl3, CH4, NH3, NH4+, H2O, CO2, gaseous PCl5, SF6 and C2H4 is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.