1. PRACTICE DRAWING ATOMS

2. DRAWING ATOMS RULES PROTONS = Atomic number ELECTRONS = Atomic number NEUTRONS = mass number – atomic number 1 st level can hold up to 2 electrons 2 nd level can hold up to 8 electrons 3 rd level can hold up to 18 electrons

3. DRAW AN ATOM – Hydrogen (H) HYDROGEN Atomic number = 1 Mass number = 1.0079

4. DRAW AN ATOM- Hydrogen (H) PROTONS = ELECTRONS = NEUTRONS = 1 P + 1 e - 1-1 = 0 N 1P + e-e- 0 N

5. DRAW AN ATOM – Helium (He) HELIUM Atomic number = 2 Mass number = 4.002

6. DRAW AN ATOM- Helium (He) PROTONS = ELECTRONS = NEUTRONS = 2 P + 2 e - 4-2 = 2 N 2P + e-e- e-e- 2 N

7. DRAW AN ATOM – Oxygen (O) OXYGEN Atomic number = 8 Mass number = 15.9994

8. DRAW AN ATOM- Oxygen (O) PROTONS = ELECTRONS = NEUTRONS = 8 P + 8 e - 2 in 1 st level 6 in 2 nd level 16-8= 8 N 8P + e-e- e-e- 8 N e-e- e-e- e-e- e-e- e-e- e-e-

9. DRAW AN ATOM – Boron (B) Boron Atomic number = 5 Mass number = 10.811

10. DRAW AN ATOM- Boron (B) P= E = N = 11 – 5 = 6 N 5P + e-e- e-e- 6 N e-e- e-e- 5e - 2 in 1 st level 3 in 2 nd level e-e-

11. DRAW AN ATOM – Aluminum (Al) Aluminum Atomic number = 13 Mass number = 26.981

12. DRAW AN ATOM – Aluminum (Al) PROTONS = ELECTRONS = NEUTRONS = 13 P + 13 e - 2 in 1 st level 8 in 2 nd level 3 in 3 rd level 27 - 13 = 14N 13P + 2e - 3e - 14 N 8e -

13. DRAW AN ATOM – Lithium (Li) LITHIUM Atomic number = 3 Mass number = 6.941

14. DRAW AN ATOM- Lithium (Li) PROTONS = ELECTRONS = NEUTRONS = 3 P + 3 e - 2 in 1 st level 1 in 2 nd level 7-3 = 4N 3P + e-e- e-e- 4 N e-e-

15. DRAW AN ATOM – Nitrogen (N) NITROGEN Atomic number = 7 Mass number = 14.0067

16. DRAW AN ATOM- Nitrogen (N) P= E = N = 14-7=7 N 7P + e-e- e-e- 7 N e-e- e-e- e-e- e-e- e-e- 7 e - 2 in 1 st level 5 in 2 nd level

17. DRAW AN ATOM – Phosphorus (P) Phosphorus Atomic number = 15 Mass number = 30.973

18. DRAW AN ATOM – Phosphorus (P) PROTONS = ELECTRONS = NEUTRONS = 15 P + 12 e - 2 in 1 st level 8 in 2 nd level 5 in 3 rd level 31-15 = 16N 15P + 2e - 5e - 16 N 8e -

19. DRAW AN ATOM – Fluorine (F) Fluorine Atomic number = 9 Mass number = 18.998

20. DRAW AN ATOM- Fluorine (F) PROTONS = ELECTRONS = NEUTRONS = 9 P + 9 e - 2 in 1 st level 7 in 2 nd level 19 – 9 = 10N 9P + 2e - 10 N 7e -

21. DRAW AN ATOM – Carbon (C) Carbon Atomic number = 6 Mass number = 12.01

22. DRAW AN ATOM- Carbon (C) P= E = N = 12 – 6 = 6 N 6 P + e-e- e-e- 6 N e-e- e-e- e-e- 6e - 2 in 1 st level 4 in 2 nd level e-e-

23. DRAW AN ATOM – Sodium (Na) SODIUM Atomic number = 11 Mass number = 22.989

24. DRAW AN ATOM- Sodium (Na) P= E = N = 23-11= 12 N 11 P + e-e- e-e- 12 N e-e- e-e- e-e- e-e- e-e- e-e- 12 e - 2 in 1 st level 8 in 2 nd level 1 in 3 rd level e-e- e-e- e-e-

25. DRAW AN ATOM – Beryllium (Be) Beryllium Atomic number = 4 Mass number = 9.01

26. DRAW AN ATOM- Beryllium (Be) P= E = N = 9 – 4 = 5 N 4P + e-e- e-e- 5 N e-e- e-e- 4e - 2 in 1 st level 2 in 2 nd level

27. DRAW AN ATOM – NEON (Ne) Neon Atomic number = 10 Mass number = 20.179

28. DRAW AN ATOM- Neon (Ne) PROTONS = ELECTRONS = NEUTRONS = 10 P + 10 e - 2 in 1 st level 8 in 2 nd level 20 – 10 = 10N 10P + 2e - 10 N 8e -

29. DRAW AN ATOM – Silicon (Si) Silicon Atomic number = 14 Mass number = 28.0855

30. DRAW AN ATOM – Silicon (Si) PROTONS = ELECTRONS = NEUTRONS = 14 P + 14 e - 2 in 1 st level 8 in 2 nd level 4 in 3 rd level 28 - 14 = 14N 14P + 2e - 4e - 14 N 8e -