Chapter 4 2025/2026

i. Draw the Lewis structure for each molecule.  

[3 Marks] 

ii. Arrange the molecules in order of increasing bond length of C-N.   

[1 Mark] 

i. Predict the molecular shapes and bond angles in each compound.   

[6 Marks] 

ii. State the hybridisation of the central atom for each compound.    

[2 Marks] 

c) Both calcium and potassium are metals. Describe the bonding in these metals and compare their strength. 

[5 Marks]