1:40 draw dot-and-cross diagrams to show the formation of ionic compounds by electron transfer, limited to combinations of elements from Groups 1, 2, 3 and 5, 6, 7 only outer electrons need be shown
Sodium chloride, NaCl
Magnesium chloride, MgCl2
![](https://www.tutormyself.com/wp-content/uploads/img_56c1e29a07912.png)
Potassium oxide, K2O
![](https://www.tutormyself.com/wp-content/uploads/img_56c1e2c0dde2b.png)
Calcium oxide, CaO
Aluminium oxide, Al2O3
![](https://www.tutormyself.com/wp-content/uploads/img_56c1e3810bb6d.png)
Magnesium nitride, Mg3N2