1. Unit 2 Review - Section 1 Atomic Structure and Mass

2. Which subatomic particles are responsible for… Element identity? Mass? Charge? Chemical Behavior?

3. Which subatomic particles are responsible for… Element identity? Protons Mass? Protons and neutrons Charge? Protons and electrons Chemical Behavior? electrons

4. Which subatomic particles are found in the nucleus?

5. Which subatomic particles are found in the nucleus? Protons and neutrons

6. Which subatomic particles have the smallest mass?

7. Which subatomic particles have the smallest mass? Electrons

8. Which subatomic particles have a positive charge?

9. Which subatomic particles have a positive charge? Protons

10. Isotopes have the same number of protons, but different numbers of ________________.

11. Isotopes have the same number of protons, but different numbers of Neutrons

12. When you add up the protons and neutrons, do you get the mass number or the average atomic mass?

13. When you add up the protons and neutrons, do you get the mass number or the average atomic mass? Mass number

14. Which is found in the periodic table, the mass number or the average atomic mass?

15. Which is found in the periodic table, the mass number or the average atomic mass? Average atomic mass

16. An atom has 26 protons, 30 neutrons, and 26 electrons. What is its atomic number? What is its mass number?

17. An atom has 26 protons, 30 neutrons, and 26 electrons. What is its atomic number? 26 What is its mass number? 56

18. An atom has 7 protons, 8 neutrons, and 7 electrons. What element is it? What is its mass number?

19. An atom has 7 protons, 8 neutrons, and 7 electrons. What is its atomic number? nitrogen What is its mass number? 15

20. For the isotope bromine-79, what is its mass number? what is its atomic number? how many neutrons does it have?

21. For the isotope bromine-79, what is its mass number? 79 what is its atomic number? 35 how many neutrons does it have? 44

22. For the isotope copper-64, how many neutrons does it have?

23. For the isotope copper-64, how many neutrons does it have? 35

24. For the isotope sodium-24, how many neutrons does it have?

25. For the isotope sodium-24, how many neutrons does it have? 13

26. For the isotope lithium-7, how many neutrons does it have?

27. For the isotope lithium-7, how many neutrons does it have? 4

28. For the isotope silver-109, write the isotope symbol?

29. Ag 109 47

30. For the isotope potassium-41, write the isotope symbol?

31. K 41 19

32. For the isotope symbol below, write the isotope name? Br 81 35

33. For the isotope symbol below, write the isotope name? Br 81 35 Bromine-81

34. For the isotope symbol below, write the isotope name? U 238 92

35. For the isotope symbol below, write the isotope name? U 238 92 Uranium-238

36. Lithium has two naturally occurring isotopes. Using the information below, calculate the average atomic mass of lithium. lithium-6 (mass = 6.01 amu, abundance = 7.6%) and lithium-7 (mass = 7.02 amu, abundance = 92.4%).

37. Lithium has two naturally occurring isotopes. Using the information below, calculate the average atomic mass of lithium. lithium-6 (mass = 6.01 amu, abundance = 7.6%) and lithium-7 (mass = 7.02 amu, abundance = 92.4%). Hint: First calculate the mass contributions of each isotope!

38. Lithium has two naturally occurring isotopes. Using the information below, calculate the average atomic mass of lithium. lithium-6 (mass = 6.01 amu, abundance = 7.6%) and lithium-7 (mass = 7.02 amu, abundance = 92.4%). Lithium-6: 6.01 amu x 0.076 = 0.46 amu Lithium-7: 7.02 amu x 0.924 = 6.49 amu Avg atomic mass = 0.46 + 6.49 = 6.94 amu

39. For more practice… http://www.sciencegeek.net/Chemistry/taters /Unit1Numbers2.htm http://www.sciencegeek.net/Chemistry/taters /Unit1Numbers2.htm http://www.sciencegeek.net/Chemistry/taters /Unit1AtomicNumbers.htm http://www.sciencegeek.net/Chemistry/taters /Unit1AtomicNumbers.htm