(a) Group 1 (alkali metals) – lithium, sodium and potassium

Understand how the similarities in the reactions of these elements with water provide evidence for their recognition as a family of elements

Understand how the differences between the reactions of these elements with air and water provide evidence for the trend in reactivity in Group 1

Use knowledge of trends in Group 1 to predict the properties of other alkali metals

Explain the trend in reactivity in Group 1 in terms of electronic configurations