Combined ScienceCode 5129
Group I properties
What this topic asks you to be able to do
- Describe lithium, sodium and potassium, the alkali metals of Group I, as metals that are relatively soft and that show general trends going down the group, limited to: (a) a decrease in melting point (b) an increase in reactivity with water
- Describe the Group I metals as flammable: they catch fire easily
- Describe and apply flame tests as a means of recognising Group I cations, limited to: (a) lithium, Li+, red (b) sodium, Na+, yellow (c) potassium, K+, lilac
- Predict the properties of other elements found in Group I, from the information given about those elements