1. Chapter 5 Review

2. Atomic Theory/Scientists Who was the first person to theorize the existence of the atom in 400 BC? Who was the first person to theorize the existence of the atom in 400 BC? Democritus Democritus

3. Atomic Theory/Scientists Who was given credit as the first person that proved the nature of atoms? Who was given credit as the first person that proved the nature of atoms? John Dalton John Dalton

4. Atomic Theory/Scientists According to Dalton’s Atomic Theory, all elements are composed of tiny indivisible particles called_______? According to Dalton’s Atomic Theory, all elements are composed of tiny indivisible particles called_______? atoms atoms

5. Atomic Theory/Scientists Dalton’s Atomic Theory stated that atoms of the same _______ are identical. Dalton’s Atomic Theory stated that atoms of the same _______ are identical. element element

6. Atomic Theory/Scientists Dalton’s Atomic Theory was for the most part correct, except for the fact that atoms can be ________. Dalton’s Atomic Theory was for the most part correct, except for the fact that atoms can be ________. divided divided

7. Atomic Theory/Scientists Who is credited with discovering the electron? Who is credited with discovering the electron? JJ Thomson JJ Thomson

8. Atomic Theory/Scientists Experiments with cathode ray tubes led to the discovery of the ________. Experiments with cathode ray tubes led to the discovery of the ________. electron electron

9. Atomic Theory/Scientists The rays produced in the early cathode ray tube experiments were attracted to a _________ charge. The rays produced in the early cathode ray tube experiments were attracted to a _________ charge. positive positive

10. Atomic Theory/Scientists JJ Thomson discovered that electrons have a very_____ mass. JJ Thomson discovered that electrons have a very_____ mass. small small

11. Atomic Theory/Scientists Who discovered the proton? Who discovered the proton? E. Goldstein E. Goldstein

12. Atomic Theory/Scientists Who discovered the neutron? Who discovered the neutron? Chadwick Chadwick

13. Atomic Theory/Scientists What happened to most of the particles in Rutherford’s gold foil experiment? What happened to most of the particles in Rutherford’s gold foil experiment? most passed through the foil most passed through the foil

14. Atomic Theory/Scientists In Rutherford’s experiment, a few of the positive particles bounced back, so what did he concluded they bounced off of? In Rutherford’s experiment, a few of the positive particles bounced back, so what did he concluded they bounced off of? a dense positive region called the nucleus a dense positive region called the nucleus

15. Atomic Theory/Scientists Who discovered the nucleus? Who discovered the nucleus? Rutherford Rutherford

16. Atomic Theory/Scientists Which experiment did we re-create in lab using wooden boards and marbles? Which experiment did we re-create in lab using wooden boards and marbles? Rutherford’s gold foil experiment Rutherford’s gold foil experiment

17. Subatomic Particles Which subatomic particle has a negative charge? Which subatomic particle has a negative charge? electron electron

18. Subatomic Particles Which subatomic particle has a positive charge? Which subatomic particle has a positive charge? proton proton

19. Subatomic Particles Which subatomic particle is neutral? Which subatomic particle is neutral? neutron neutron

20. Atoms Atoms are electrically neutral because the number of _________ equals the number of ___________. Atoms are electrically neutral because the number of _________ equals the number of ___________. protons equal electrons protons equal electrons

21. Atoms What is the charge of the nucleus of an atom? What is the charge of the nucleus of an atom? positive (because the protons are positive) positive (because the protons are positive)

22. Atoms What determines the identity of an element? What determines the identity of an element? the number of protons the number of protons

23. Atoms Isotopes of the same element differ in what two ways? Isotopes of the same element differ in what two ways? mass number and number of neutrons mass number and number of neutrons

24. Atoms What 3 things do isotopes of the same element have in common? What 3 things do isotopes of the same element have in common? atomic number, number of protons and electrons atomic number, number of protons and electrons

25. Atoms How do you find the number of protons for an atom? How do you find the number of protons for an atom? same as the atomic number same as the atomic number

26. Atoms How do you find the number of neutrons for an atom? How do you find the number of neutrons for an atom? mass # - atomic # mass # - atomic #

27. Atoms How do you find the number of electrons for an atom? How do you find the number of electrons for an atom? same as the atomic number same as the atomic number

28. Atoms All atoms of the same element have the same ________ ________. All atoms of the same element have the same ________ ________. atomic number atomic number

29. Atoms What element is the standard for determining atomic mass units? What element is the standard for determining atomic mass units? Carbon - 12 Carbon - 12

30. Atoms The average atomic mass depends on the masses of the isotopes and the relative __________ of each isotope. The average atomic mass depends on the masses of the isotopes and the relative __________ of each isotope. abundance abundance

31. Atoms What unit is used to measure relative atomic mass? What unit is used to measure relative atomic mass? amu’s amu’s

32. Atoms The atomic mass listed on the periodic table is a _______ atomic mass. The atomic mass listed on the periodic table is a _______ atomic mass. average average

33. Atoms Sodium has atomic number 11. If a sodium atom has a mass of 23, how many protons does it have? Sodium has atomic number 11. If a sodium atom has a mass of 23, how many protons does it have? 11 11 (same as atomic number) (same as atomic number)

34. Atoms Sodium has atomic number 11. If a sodium atom has a mass of 23, how many neutrons does it have? Sodium has atomic number 11. If a sodium atom has a mass of 23, how many neutrons does it have? 12 12 (subtract mass#-atomic#) (subtract mass#-atomic#)

35. Atoms Sodium has atomic number 11. If a sodium atom has a mass of 23, how many electrons does it have? Sodium has atomic number 11. If a sodium atom has a mass of 23, how many electrons does it have? 11 11 same as atomic number same as atomic number

36. Atoms A carbon atom has 6 protons, 6 electrons and 8 neutrons. What is it’s mass number? A carbon atom has 6 protons, 6 electrons and 8 neutrons. What is it’s mass number? 14 (protons + neutrons) 14 (protons + neutrons)

37. Atoms A carbon atom has 6 protons, 6 electrons and 8 neutrons. What is it’s atomic number? A carbon atom has 6 protons, 6 electrons and 8 neutrons. What is it’s atomic number? 6 (same as protons) 6 (same as protons)

38. Atoms Hg-200 has an atomic number of 80. How many neutrons does it have? Hg-200 has an atomic number of 80. How many neutrons does it have? 120 120

39. Atoms Hg-200 has an atomic number of 80. How many protons does it have? Hg-200 has an atomic number of 80. How many protons does it have? 80 80

40. Atoms Hg-200 has an atomic number of 80. How many electrons does it have? Hg-200 has an atomic number of 80. How many electrons does it have? 80 80

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