Pages in this set

Page 1

Preview of page 1
Topic 1- Atoms
Atoms are everywhere! Everything you see is made of atoms. Everything around us
is made of atoms. For your GCSE Chemistry Exams you must be able to structure
and draw atoms easily by looking at the periodic table.

You need to know that in an atom there…

Page 2

Preview of page 2
You also need to understand these words mean:

Element- An element is a substance with one type of atom e.g.: Copper is an
element as it is only made of copper atoms.

Compound- A substance made from two types of atoms e.g.: Carbon dioxide

Mixture- A substance made from more…

Page 3

Preview of page 3
To make it easier, I will draw the atom shells one by one. Here is the first shell.
Remember Magnesium has 12 electrons!




We now are left with 10 electrons.

Page 4

Preview of page 4
Exam Notes:

Make sure you know the electronic structure inside out ready for the exam. It is
vital that this is not forgotten as there are many questions likely to come in your
exam asking you to draw at least one type of element, compound, and mixture. If
you do…

Page 5

Preview of page 5
Also take note that electron shells can also be called energy
levels, so don't be confused in exams if they use different terminology.

Make sure you also practice drawing elements. It is rare for you to draw compounds
and mixture but practice anyway and make sure you have the correct…

Page 6

Preview of page 6
I have colour coded the different groups. You need to know that the blue line
separates all the metals from the non-metals. So all the elements from the
right-hand side up to the blue line are all metals.

Another piece of important information you need to know is the fact…

Page 7

Preview of page 7
As the noble gases are uncreative they are uses in electric appliances e.g.: Argon in
used for the filament of a light bulb as it is unreactive and it passes electricity very
easily. It is very unlikely to create a bad reaction which can cause damages so it is
ideal…

Page 8

Preview of page 8
Topic 3- Ionic Bonding and Covalent Bonding
Ionic Bonding

You need to know that the elements that are the most reactive are the ones which
do NOT HAVE FULL OUTER SHELLS which determines what reaction an element
makes. The fact that they do not have full outer shells makes them…

Page 9

Preview of page 9
Now you need to
remember that both these elements are reactive as they do not have full shells.
You also need to know that METALS ALWAYS GIVE ELECTRONS TO NON ­METALS. So
as Sodium (Na) is the metal, it gives its OUTER electron to Chlorine (Cl) which is the
non…

Page 10

Preview of page 10
Now you need to do is put square brackets around the final elements and state
whether they are positively or negatively charged or neutral and by how many
electrons or protons. YOU NEED TO REMEMBER THAT THEY WILL NEVER BE NEUTRAL
AS THEY ARE EITHER GAINING OR LOSING ELECTRONS SO…

Comments

No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all resources »