10.1.1: The reactions of the group 1 metals
E-assessement - B1: Periodic Table:
Activity - Class demonstration (about 40 minutes)
The students are shown the three metals, Li, Na and K
The metals are cut with a steel scalpel.
They are placed in a bowl of water in the fume cupboard and observed.
With lithium the gas evolved is collected and tested with a lighted splint. The remaining liquid is tested with universal indicator. Equations are derived for the reaction.
Write up the demonstration using the notes taken during the class to "compare and contrast the properties of the group 1 metals". Suggest trends that may be extrapolated about the properties of group 1 metals.
A(i) - Explain scientific knowledge
A(iii) - Analyse and evaluate information to make scientifically supported judgements