2.  The periodic table organizes the Elements  Understanding the periodic table will help you learn about each of the 118 known elements.

3.  Element square  Identifies each known element  Symbol  Name  Atomic Number  Mass Number

4.  This refers to how many protons an atom of that element has.  No two elements, have the same number of protons. Bohr Model of Hydrogen Atom Wave Model

5. State the number of protons for atoms of each of the following: A. Nitrogen 1) 5 protons 2) 7 protons 3) 14 protons B. Sulfur 1) 32 protons 2) 16 protons 3) 6 protons C. Barium 1) 137 protons 2) 81 protons 3) 56 protons LecturePLUS Timberlake 5

6. State the number of protons for atoms of each of the following: A. Nitrogen 2) 7 protons B. Sulfur 2) 16 protons C. Barium 3) 56 protons LecturePLUS Timberlake 6

7.  Atomic Mass refers to the “weight” of the atom.  Add the number of protons with the number of neutrons. H This is a helium atom. Its atomic mass is 4 (protons plus neutrons). What is its atomic number?

8.  Mass Number – Atomic Number  Or  Protons + Neutrons  - Protons  Number of Neutrons  Because it’s and average  Round the number

9.  http://www.youtube.com/watch?v=_S7 ov25y3_M&feature=edu&list=PL64B4E713 AC151B87&edufilter=s_UX_rN7asYugcCw XdZRJg http://www.youtube.com/watch?v=_S7 ov25y3_M&feature=edu&list=PL64B4E713 AC151B87&edufilter=s_UX_rN7asYugcCw XdZRJg

10.  How Many Neutrons in  1. Cr Mass Number = 51.996  2. Fr Mass Number = 223  3. Mg Mass Numb er = 24.305  4. Si Mass Number = 28.086

11.  How Many Neutrons in  1. Cr Mass Number = 51.996 27.996  2. Fr Mass Number = 223  136  3. Mg Mass Number = 24.305  12.305  4. Si Mass Number = 28.086  14.086

12. Number of protons = Number of electrons Atomic number = Number of electrons LecturePLUS Timberlake 12

13.  How many electrons are in  1. K  2. Ca  3. Ba  4. O  5. Br

14.  How many electrons are in  1. K  19  2. Ca  20  3. Ba  56  4. O 8  5. Br  35

15. Atoms with the same number of protons, but different numbers of neutrons. Isotopes of chlorine 35 Cl 37 Cl17 chlorine - 35 chlorine - 37 LecturePLUS Timberlake 15

16.  http://www.youtube.com/watch?v=xjY5 p- 1CDr8&feature=edu&list=PL64B4E713AC1 51B87&edufilter=s_UX_rN7asYugcCwXdZ RJg http://www.youtube.com/watch?v=xjY5 p- 1CDr8&feature=edu&list=PL64B4E713AC1 51B87&edufilter=s_UX_rN7asYugcCwXdZ RJg

17.  http://www.youtube.com/watch?v=9d3 NcxFG3RQ&feature=edu&list=PL64B4E71 3AC151B87&edufilter=s_UX_rN7asYugcC wXdZRJg http://www.youtube.com/watch?v=9d3 NcxFG3RQ&feature=edu&list=PL64B4E71 3AC151B87&edufilter=s_UX_rN7asYugcC wXdZRJg

18. Naturally occurring carbon consists of three isotopes, 12 C, 13 C, and 14 C. State the number of protons, neutrons, and electrons in each of these carbon atoms. 12 C 13 C 14 C 6 6 6 #p _______ _______ _______ #n _______ _______ _______ #e _______ _______ _______ LecturePLUS Timberlake 18

19. 12 C 13 C 14 C 6 6 6 #p 6 6 6 #n 6 7 8 #e 6 6 6 LecturePLUS Timberlake 19

20. An atom of zinc has a mass number of 65. A.Number of protons in the zinc atom 1) 302) 353) 65 B.Number of neutrons in the zinc atom 1) 302) 353) 65 C. What is the mass number of a zinc isotope with 37 neutrons? 1) 372) 653) 67 LecturePLUS Timberlake 20

21. An atom of zinc has a mass number of 65. A.Number of protons in the zinc atom 1) 30 B.Number of neutrons in the zinc atom 2) 35 C. What is the mass number of a zinc isotope with 37 neutrons? 3) 67 LecturePLUS Timberlake 21

22. Write the atomic symbols for atoms with the following: A. 8 p +, 8 n, 8 e - ___________ B.17p +, 20n, 17e - ___________ C. 47p +, 60 n, 47 e - ___________ LecturePLUS Timberlake 22

23. 16 O A. 8 p +, 8 n, 8 e - 8 B.17p +, 20n, 17e - 37 Cl 17 C. 47p +, 60 n, 47 e - 107 Ag 47 LecturePLUS Timberlake 23