1. Elements and Compounds
Can use the diagram to recap last lesson. Labels:
Nucleus
Protons
Neutrons
Electrons
Shells

2. Atoms are the fundamental building blocks of the universe.
They can be joined together by chemical bonds
Analogy here is like lego bricks

3. From last lesson:
Atoms can have different numbers of protons, neutrons and electrons.
There are 118 different types of atoms.
They can be found on the periodic table of elements.

4. If something is made of the same type of atom then it is called an element

5. Complete questions 1-9 on your sheet
Extension: find the periodic table of elements in the back of your link book. Start thinking about all the things on it that you notice

6. The 118 different types of atom all have a name and a special symbol
These can be found on the Periodic Table of Elements

7. When different things are together but not chemically bonded, the result is called a mixture
Could use any example, sand in water, pens in a pencil case, students in a room…

8. Types of Substance

9. If between 2 and 100 atoms are chemically bonded together, the substance is called a molecule
They can be the same atoms or different ones!

10. Q10-15 in booklet
3. Can have students explain their answers verbally or in their books.

11. Molecular Substances
They are made of individual molecules that are totally separate from each other. This is water which is one of the key examples we will be looking at.

12. Each substance has a chemical formula.
This tells you which atoms the molecules are made of
For example, water’s chemical formula is H2O. This means each molecule has two hydrogen atoms and one oxygen atom chemically bonded together.
Molecules have between two and a hundred atoms

13. Fill in the gaps on the worksheet
Start reading ahead in the worksheet

14. Atoms of which elements, and how many of them, are in:
H2 O2 H2O CH4 CO2 Q17-25
Do the first one or two together

15. Giant structures

16. In one kg of iron there are 1.1x1025 atoms
That means in one kg of iron there are:
atoms

17. These atoms are all chemically bonded – billions and billions of them on and on and on. This is called a giant structure
Mention that this is in three dimensions. Giant doesn’t necessarily mean “big”. 1kg of iron isn’t “big.” But with respect to atoms, it certainly is “big” as we are dealing with many billions of them.

18. Giant structures can be elements or compounds
Iron is an element, iron oxide is a compound. Ratio is incorrect for simplicity.
Iron
Iron oxide

19. Complete the next fill in the gaps on the sheet
Start reading ahead

20. We can also write chemical formulae for giant structures
E.g. aluminium oxide is Al2O3
It has two aluminium atoms and three oxygen atoms
Q26-33
This is a proportional thing. So if you take a lump of iron oxide, 2 out of every 5 will be iron and 3 out of every 5 will be oxygen.