1. Take Out Science notebook open to homework Catalyst sheet Pencil

2. Catalyst 16 S Sulfur 32.065 Atomic Number: Protons: Neutrons: Electrons: Element Symbol: Element Name: State of Matter: Atomic Mass: Element type:

3. Energy Levels The electrons swirl around the nucleus at certain average distances from the nucleus (the protons and the neutrons) in the electron cloud The areas where the electrons travel are called energy levels.

4. Why do you think there are two electrons on the inner ring and three on the outer ring?

5. Only a certain number of electrons can be held in an energy level.

7. Yellow Brick Road

9. Energy Level (n)Electron Capacity (2n 2 ) 12 28 318 432 550 672 The maximum number of electrons that can occupy a specific energy level can be found using the following formula: Electron Capacity = 2n 2 The variable n represents the number of the energy level in question. Keep in mind that an energy level need not be completely filled before electrons begin to fill the next level.

10. 13 Al Aluminum 26.982 Atomic Number: Protons: Neutrons: Electrons: Element Symbol: Element Name: State of Matter: Atomic Mass: Element type: Electron Configuration: Green = Nonmetals Yellow = Metals Blue = Transition Metals Orange = Noble Gases

11. 1s 2 2s 2 2p 6 3s 2 3p 1 How many electrons does Al have in each energy level? 1 st energy level: 2 nd energy level: 3 rd energy level:

12. Write the electron configuration for Carbon Draw a Bohr model of Carbon 6 C Carbon 12.011

13. Homework Complete electron configuration practice on page 44 of science notebook Atomic structure quiz on Friday

14. Take Out Science notebook open to homework Catalyst sheet Pencil

15. Write/draw 4 ways to illustrate an atom of the element Antimony (presume a neutral atom) Element Name: Element Symbol: Electron Configuration: Bohr Model: 51 Sb Antimony 127.60 Catalyst

16. Valence Electrons Valence electrons are electrons that are in the outer most level of the electron cloud They are always found in s & p orbitals How many valence electrons does Aluminum have?

17. 1s 2 2s 2 2p 6 3s 2 3p 1

18. Electron Dot Notation Al

19. Valence electrons 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 10 4p 6 4d 10 5s 2 5p 3 Number of valence electrons (in the last s and p orbitals) Electron dot notation: Sb 51 Sb Antimony 127.60

21. Homework Complete “5 Ways to Represent an Atom” on page 47 of science notebook Atomic structure quiz on Friday

22. Take Out Science notebook open to homework Catalyst sheet Pencil

23. Write/draw 5 ways to illustrate the element to the left (presume a neutral atom) Element Name: Element Symbol: Electron Configuration: Bohr Model: Electron Dot Notation: 6 C 12.011 Catalyst

24. 1s 2 2s 2 2p 2 Number of valence electrons (in the last s and p orbitals) Electron dot notation: C 6 C Carbon 12.011

25. Write/draw 5 ways to illustrate the element to the left (presume a neutral atom) Element Name: Element Symbol: Electron Configuration: Bohr Model: Electron Dot Notation: 15 P 30.973

26. 1s 2 2s 2 2p 6 3s 2 3p 3 Number of valence electrons (in the last s & p orbitals) Electron dot notation: P 15 P Phosphorous 30.973

27. Write/draw 5 ways to illustrate the element to the left (presume a neutral atom) Element Name: Element Symbol: Electron Configuration: Bohr Model: Electron Dot Notation: 19 K 39.0983

28. 1s 2 2s 2 2p 6 3s 2 3p 6 4s 1 Number of valence electrons (in the last s orbital) Electron dot notation: K 19 K Potassium 39.0983 20.098

29. Write/draw 5 ways to illustrate the element to the left (presume a neutral atom) Element Name: Element Symbol: Electron Configuration: Bohr Model: Electron Dot Notation: 54 Xe 131.293

30. 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 10 4p 6 5s 2 4d 10 5p 6 Number of valence electrons (in the last s & p orbitals) Electron dot notation: Xe 54 Xe Xenon 131.293

31. Write/draw 5 ways to illustrate the element to the left (presume a neutral atom) Element Name: Element Symbol: Electron Configuration: Bohr Model: Electron Dot Notation: 56 Ba Barium 137.327

32. [Xe]6s 2 Number of valence electrons (in the last s & p orbitals) Electron dot notation: Ba 56 Ba Barium 137.327

33. Homework Complete page 47, answers are on website Prepare for test on Friday Add 5 new vocab words to Vocabulary Section