1. Bohr Diagrams

2. # protons =

3. Bohr Diagrams # protons = atomic number

4. Bohr Diagrams # protons = atomic number # electrons =

5. Bohr Diagrams # protons = atomic number # electrons = # protons

6. Bohr Diagrams # protons = atomic number # electrons = # protons # neutrons =

7. Bohr Diagrams # protons = atomic number # electrons = # protons # neutrons = atomic mass – atomic number e.g. fluorine # protons = ?

8. Bohr Diagrams # protons = atomic number # electrons = # protons # neutrons = atomic mass – atomic number e.g. fluorine # protons = 9 # electrons = ?

9. Bohr Diagrams # protons = atomic number # electrons = # protons # neutrons = atomic mass – atomic number e.g. fluorine # protons = 9 # electrons = 9

10. Bohr Diagrams # protons = atomic number # electrons = # protons # neutrons = atomic mass – atomic number e.g. fluorine # protons = 9 # electrons = 9 # neutrons = ?

11. Bohr Diagrams # protons = atomic number # electrons = # protons # neutrons = atomic mass – atomic number e.g. fluorine # protons = 9 # electrons = 9 # neutrons = 10

12. Bohr Diagrams step 1: protons & neutrons are drawn in the nucleus

13. Bohr Diagrams step 1: protons & neutrons are drawn in the nucleus step 2: electrons are drawn in orbits around the nucleus

14. Bohr Diagrams step 1: protons & neutrons are drawn in the nucleus step 2: electrons are drawn in orbits around the nucleus first orbit can hold up to 2 electrons

15. Bohr Diagrams step 1: protons & neutrons are drawn in the nucleus step 2: electrons are drawn in orbits around the nucleus first orbit can hold up to 2 electrons other orbits can hold up to 8 electrons

16. Bohr Diagrams step 1: protons & neutrons are drawn in the nucleus step 2: electrons are drawn in orbits around the nucleus first orbit can hold up to 2 electrons other orbits can hold up to 8 electrons e.g. fluorine # protons = 9 # electrons = 9 # neutrons = 10

17. Bohr Diagrams step 1: protons & neutrons are drawn in the nucleus step 2: electrons are drawn in orbits around the nucleus first orbit can hold up to 2 electrons other orbits can hold up to 8 electrons e.g. fluorine # protons = 9 # electrons = 99P # neutrons = 1010N

18. Bohr Diagrams step 1: protons & neutrons are drawn in the nucleus step 2: electrons are drawn in orbits around the nucleus first orbit can hold up to 2 electrons other orbits can hold up to 8 electrons e.g. fluorine # protons = 9 # electrons = 99P # neutrons = 1010N

19. Bohr Diagrams step 1: protons & neutrons are drawn in the nucleus step 2: electrons are drawn in orbits around the nucleus first orbit can hold up to 2 electrons other orbits can hold up to 8 electrons e.g. fluorine # protons = 9 # electrons = 99P # neutrons = 1010N