The Periodic Table
BY CAIT…read more

How is it organised?
The periodic table arranged all the elements in groups
according to their properties...
V HORIZONTAL
E
R rows are called
T columns are called PERIODS
I GROUPS
C
A
L…read more

Electron Arrangements
Elements in the same group have the same number of
electrons in the outer shell.
This also corresponds to their group number.
For example...
All metals in group 1 have 1 electron in their outer
shell.…read more

Electron Shell Arrangements
As you move down through the periods, an extra
electron shell is added.
For example:
In period 1, there is 1 shell.
In period 2, there is 2 shells.
And so on.…read more

Most importantly...
All of the elements in the same group have similar
properties. This is called PERIODICITY.
For example: Group 1 metals are all...
1) Soft
2) Can be easily cut with a knife
3) React with water…read more

Group 1 ­ The Alkali Metals
Density increases as you go down the group
Reactivity increases as you go down the group ­ this
is because the electrons are further away from the
nucleus and so any extra electrons aren't attracted as
much
They all react with water to form an alkali…read more