Core
- Describe the Periodic Table as a method of classifying elements and its use to predict properties of elements
- Describe lithium, sodium and potassium in Group I as a collection of relatively soft metals showing a trend in melting point, density and reaction with water
- Predict the properties of other elements in Group I, given data, where appropriate
- Describe chlorine, bromine and iodine in Group VII as a collection of diatomic non-metals showing a trend in colour, and state their reaction with other halide ions
- Predict the properties of other elements in Group VII, given data where appropriate
- Describe the transition elements as a collection of metals having high densities, high melting points and forming coloured compounds, and which, as elements and compounds, often act as catalysts
Supplement
- Describe the relationship between Group number, number of valency electrons and metallic/non-metallic character
- Identify trends in other Groups, given information about the elements concerned