2. C9 The Periodic TableC9 The Periodic Table
1. Describe the way the Periodic Table classifies
elements in order of proton number.
2. Use the Periodic Table to predict properties of
elements by means of groups and periods.
3. 9.1 Periodic trends9.1 Periodic trends
1. Describe the change from metallic to non-
metallic character across a period.
2. Describe the relationship between Group
number, number of outer-shell (valency) electrons
and metallic/non-metallic character.
4. 9.2 Group properties9.2 Group properties
Group I (alkali metals)
1. Describe lithium, sodium and potassium in Group
I as a collection of relatively soft metals showing
a trend in melting point and reaction with water.
2. Predict the properties of other elements in
Group I, given data where appropriate.
5. 9.2 Group properties9.2 Group properties
Group VII (halogens)
3. Describe the trends in properties of chlorine,
bromine and iodine in Group VII including colour,
physical state and reactions with other halide
ions.
4. Predict the properties of other elements in
Group VII, given data where appropriate.
6. 9.3 Transition elements9.3 Transition elements
1. 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.
7. 9.4 Noble gases9.4 Noble gases
Group 0
1. Describe the noble gases as being unreactive.
2. Describe the uses of the noble gases in
providing an inert atmosphere, i.e. argon in lamps,
helium for filling balloons.
