We are now going to review some things about covalent bonding and covalent compounds.
TASK 1: Are we ready? Click here www.youtube.com/watch?v=CCo1Ffn9_u8
Task 2: To move from GCSE to A-level Chemistry, study the summary notes and then watch the videos below in sequence.
Task 3: Now go through the videos below - on your own or together with video conferencing. The first one recaps shapes of orbitals. REMEMBER, ORBITALS NEED TO OVERLAP WITH EACH OTHER AND A SHARED PAIR OF ELECTRONS OCCUPIES THIS OVERLAPPED, COMBINED SHAPE ORBITAL .
Task 4: From what you have read and seen, and from other research, write an account or draw a spider diagram/mind map about covalent bonding and covalent compounds.
Task 5: Past paper practice:
- Draw a dot-and-cross diagram to show the electronic structure of the compound tetrachloromethane (only the outer electrons need be shown). 2 marks
- Draw a dot-and-cross diagram of a molecule of carbon dioxide. Show outer electrons only. 2 marks
(Edexcel GCE Jan 2011, 6CH01, Q17b)
(Edexcel GCSE Jun 2013, 5CH2H, Q2(iii))
TASK 6: Now try question 1.1 below. Try 2 as well if you want to.
TASK 7: Draw diagrams to represent sigma and pi bonds in ethene. The PowerPoint below may help you.