1. Catalyst (4 min) What is the mass number of the atom below? What element is the atom? ++ + + - - - -

2. What is the mass number of the atom below? Atomic mass = #p + #n Atomic mass = 4 +5 Atomic mass = 9 What element is the atom? 4 protons Beryllium! NOTE: ATOM BROCHURE DUE MONDAY! ++ + + - - - -

3. Atomic Structure Review 10-21-10

4. How the Game Works… Question on the screen Work with your groups To get the point  Board in the air on time  Correct answer Team with the most points WINS! Points off:  Cheating  Lack of participation  Whining/ Arguing  Disrespectful language/behavior

5. Question #1 What subatomic particle has a positive charge and where is it located? ++ + + - - - - Proton (+) In the nucleus

6. Question #2 How does the charge of an electron compare with the charge of a proton? A. Electrons have a greater charge and the opposite sign B. Electrons have a greater charge and the same sign C. Electrons have the same magnitude of charge and the opposite sign D. Electrons have the same magnitude of charge the same sign.

7. Question #3 An element has 12 protons, 10 neutrons and 12 electrons. What element is the atom? 12 protons MAGNESIUM!

8. Question #4 Why do atoms have a neutral charge overall even though they are made of charged particles? #protons = # electrons Protons (+) and electrons (-) have opposite charges The charges cancel out!

9. Question #5 If an atom has 4 protons, 4 electrons and 5 neutrons, what is the atomic mass of the atom? Mass = #p + #n Mass = 4 + 5 Mass = 9

10. Question #6 What are two reasons why scientists use symbols to represent the different elements? Easier to write All scientists use the same symbols

11. Question #7 An atom has 7 protons and 5 neutrons. How many electrons does the atom have? #protons = #electrons 7 electrons!

12. Question #8 What is the element symbol of an atom with 18 protons and 17 neutrons? Atomic # = 18 Argon!

13. Question #9 An atom has a mass number of 15 and 9 protons. How many neutrons does the atom have? Mass number = #p + # n 15 = 9 + # n 6 = # n

14. Question #10 The atomic number of an atom is 8 and the atomic mass is 14. How many protons, electrons and neutrons are in the atom? Atomic # = # protons 8 protons! # protons = # electrons 8 electrons! Mass number = #p + #n 14 = 8 + #n 6 neutrons!

15. Question #11 What is the element symbol of an atom with a mass number of 25 and 11 neutrons? Mass number = #p + #n 25 = #p + 11 #p = 25 -11 #p = atomic # = 14 Silicon Si

16. Question #12 What element is the atom below? 9 protons FLUORINE ++ + + - - - - + + + + +

17. Question #13 What is the atomic number of the atom below? Atomic # = 10 What is the mass number of the atom below? mass number = 15 ++ + + - - - - + + + + + +

18. Question #14 How many electrons should the atom below have? #protons = #electrons 8 protons It should have 8 electrons! ++ + + + + + +

19. Question #15 How many charged particles are in a sodium (Na) atom? Protons and electrons are charged #protons = #electrons 11 protons + 11 electrons 22 charged particles!

20. Question #16 The atomic number of an atom is 5 and the atomic mass is 13. How many protons, electrons and neutrons are in the atom? Atomic # = # protons 5 protons! # protons = # electrons 5 electrons! Mass number = #p + #n 13 = 5 + #n 7 neutrons!