1. Topic
Atomic structure
Level
GCSE
Outcomes
To work out what the atomic number and mass number tell you about atomic structure
To calculate proton, electron and neutron numbers from the atomic and mass numbers for a range of atoms
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2. What do these numbers tell you about atomic structure
What do these numbers tell you about atomic structure? Can you work it out?! 23 Na 11

3. H 1 - +

4. Li 7 - 3 + - + + -

5. Be 9 - 4 + - + + + - -

6. - C 12 - 6 + - + + + + + - - -

7. - - O 16 - 8 + - + + + + + - + + - - -

8. - - F 19 - 9 + + - + - + + + + + - + - - -

9. - Mg 24 - - 12 - + + + - - + + + + + + + - - + + - - - -

10. ? - - - + - - + + + + + + - - + + + - - - ? ?
Have you spotted the pattern?
What atom is this?
What is the atomic number?
What is the mass number?

11. - - - ? ? - ? + + + - - - + + + + + + + + - - - + + + - - - -

12. Atom
Shell
Electron
Neutron - +
Proton
Nucleus

13. What have you discovered about:
The number of protons and neutrons in each atom?
The number of electrons that can fit in the first shell of each atom?
The number of electrons that can fit in the second and third shell of each atom?
Can you draw an atom of aluminium?
Can you draw an atom of sulphur?
Why is it difficult to draw an atom of copper?