Note:
IGCSE Chemistry Notes on Periodic Table
9.1 The Periodic Table
Core
Describe the Periodic Table as a method of
classifying elements and its use to predict
properties of elements
9.2 Periodic trends
Core
- Describe the change from metallic to nonmetallic character across a period
Supplement
- Describe and explain the relationship between
group number, number of outer-shell electrons
and metallic/non-metallic character
9.3 Group properties
Core
- 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 the halogens, chlorine, bromine and
iodine in Group VII, as a collection of diatomic
non-metals showing a trend in colour and density
and state their reaction with other halide ions
- Predict the properties of other elements in
Group VII, given data where appropriate
Supplement
- Identify trends in groups, given information
about the elements concerned
9.4 Transition elements
Core
- 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
- Know that transition elements have variable
oxidation states
9.5 Noble gases
Core
- Describe the noble gases, in Group VIII or 0, as
being unreactive, monoatomic gases and explain
this in terms of electronic structure
- State the uses of the noble gases in providing an
inert atmosphere, i.e. argon in lamps, helium for
filling balloons