Periodic Table classifies
elements in order of atomic
(proton) number
Use the Periodic Table to
predict properties of
elements by means of groups
and periods
Colomns are the groups.
Rows are Periods
Describe the change
from metallic to
non-metallic character
across a period
The zigzag line
Describe the relationship
between Group number,
number of valency
electrons
The group number is
same as the number of
outer-shell electrons.
Describe lithium, sodium and
potassium in Group I
~ metal floats, so less dense than water
~fizzing indicates
a gas is given off
~the molten ball (not Li) indicates highly
exothermic reaction
~lilac flame (K) indicates very
exothermic reaction because the hydrogen gas is given off
ignites
Predict the properties of
other elements in Group I,
given data, where
appropriate
Describe the trends in
properties of chlorine,
bromine and iodine in Group
VII
Predict the properties of
other elements in Group VII,
given data where
appropriate
Describe the noble gases
as being unreactive
They have a stable
outer shell of electrons.
Describe the uses of the noble
gases in providing an inert
atmosphere
argon in lamps,
helium for filling
balloons
Describe the
transition elements
collection of metals having high densities,
high melting points and forming coloured
compounds, and which, as elements and
compounds, often act as catalysts