1. Today in Physical Science 
Students will review the location and properties of the three main sub-atomic particles.
Students will also be able to draw atoms using information from the Periodic Table of the Elements.

2. Agenda-
Attendance
Brief Discussion / Review of “Build an Atom” Computer Simulation
Notes and Practice : Drawing Atoms- Quiz Friday 

3. PRACTICE DRAWING ATOMS

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

5. DRAW AN ATOM – Hydrogen (H)
Atomic number = 1
Mass number =

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

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

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

9. DRAW AN ATOM – Oxygen (O)
Atomic number = 8
Mass number =

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

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

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

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

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

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

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

17. DRAW AN ATOM – Nitrogen (N)
Atomic number = 7
Mass number =

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

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

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

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

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

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

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

25. DRAW AN ATOM – Sodium (Na)
Atomic number = 11
Mass number =

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

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

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

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

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

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

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