1. Atomic Model Scientists Nuclear Chem ParticlesPotpourri 100 200 300 400 500 Final

2. Atomic Model 100 Atomic Model Name the apparatus used to discover the electron Answer Answer

3. Atomic Model Atomic Model 100 Cathode ray tube

4. Atomic Model 200 Atomic Model Thomson’s discovery of the electron led to his development of what atomic model? Answer Answer

5. Atomic Model Atomic Model 200 Plum Pudding Model

6. Atomic Model 300 Atomic Model What conclusion can be drawn from the fact that most of the alpha particles passed straight through the foil in the Gold Foil Experiment? Answer Answer

7. Atomic Model Atomic Model 300 An atom is mostly empty space.

8. Atomic Model 400 Atomic Model What conclusion can be drawn from the fact that some of the alpha particles were deflected by (bounced back from) the foil in the Gold Foil Experiment? Answer Answer

9. Atomic Model Atomic Model 400 Answer Atoms have a small, dense, positive nucleus.

10. Atomic Model 500 Atomic Model Draw diagrams and explain the 4 main atomic models from Greek times to present. Answer

11. Atomic Model Atomic Model 500 Answer Indivisible PlumBohr Electron Sphere Pudding (Planetary)Cloud

12. Scientists 100 Scientists Name the scientist who used the Oil Drop Experiment to determine the charge on an electron. Answer Answer

13. Scientists Scientists 100 Answer Millikan

14. Scientists Scientists 200 Answer Discovered and named two new elements. First woman to earn a Nobel Prize. First person to win 2 Nobels. Established use of X-Rays in WWI.

15. Scientists 200 Scientists Describe two of Marie Curie’s unique accomplishments as a scientist. Answer

16. Scientists 300 Scientists Name the discoverer of the neutron. Answer Answer

17. Scientists Scientists 300 James Chadwick

18. Scientists 400 Scientists Describe two corrections to Dalton’s 1808 Atomic Theory. Answer Answer

19. Scientists Scientists 400 Answer Atoms are divisible (they are made of smaller particles) Atoms of same element can have different masses (isotopes) Atoms can be created and destroyed (nuclear chemistry)

20. Scientists 500 Scientists Name the scientists credited with the discovery of radioactivity. Explain how this discovery changed the idea of the “indivisible” atom. Answer Answer

21. Scientists Scientists 500 Answer Henri Becquerel, Marie Curie, Pierre Curie The fact that something can be emitted from the atom indicated that it must have subatomic particles.

22. Nuclear Chem 100 Nuclear Chem Write the nuclear symbols for an alpha particle and a beta particle. Answer Answer

23. Nuclear Chem Nuclear Chem 100 Answer Alpha particle Beta particle

24. Nuclear Chem 200 Nuclear Chem What type of radioactive decay results in energy only being emitted from the nucleus? Answer

25. Nuclear Chem Nuclear Chem 200 Gamma radiation

26. Nuclear Chem 300 Nuclear Chem Write the nuclear chemical equation for the beta decay of rubidium-90. Answer Answer

27. Nuclear Chem Nuclear Chem 300 Answer

28. Nuclear Chem 400 Nuclear Chem Write the nuclear symbol of the new element produced when Neptunium-237 (Np) undergoes alpha decay. Answer Answer

29. Nuclear Chem Nuclear Chem 400 Answer

30. Nuclear Chem 500 Nuclear Chem What scientist discovered the nucleus of the atom and later the proton? What was his/her country of origin? Answer Answer

31. Nuclear Chem Nuclear Chem 500 Ernest Rutherford of New Zealand

32. Particles 100 Particles Name the particle that has about the same mass as a proton but no electric charge. Answer Answer

33. Particles Particles 100 Answer Neutron

34. Particles 200 Particles Write the complete nuclear symbol for the particle that has 48 protons 64 neutrons 46 electrons Answer Answer

35. Particles Particles 200 Answer

36. Particles 300 Particles Give the number of protons, neutrons and electrons in potassium- 40. Answer Answer

37. Particles Particles 300 Answer 19 protons 21 neutrons 19 electrons

38. Particles 400 Particles Give the number of protons neutrons and electrons for the most abundant isotope of B 3- Answer Answer

39. Particles Particles 400 5 protons 6 neutrons 8 electrons

40. Particles 500 Particles Name the force which holds together the particles in the nucleus. Explain why it is strange to us. Answer Answer

41. Particles Particles 500 Nuclear Force It is strange because like charges usually repel, yet many positive charges are held together in small space.

42. 100 Potpourri How many atoms are in 7.8 x 10 -3 moles of zinc? Answer Answer

43. Potpourri 100 Using Avogadro’s number as the conversion factor: ? Atoms = 7.8 x 10 -3 mol X 6.02 x 10 23 atoms mol = 4.7 x 10 21 atoms

44. 200 Potpourri How many moles are there in 50.5 g of neon? AnswerAnswer

45. Answers for Potpourri 200 Using molar mass of Ne = 20.18 g/mol ? Mol = 50.5 g x 1 mol = 2.50 mol 20.18 g

46. 300 Potpourri Name the two main regions of the atom. Which region occupies most of the volume of the atom. Which region has most of the atom’s mass? Answer Answer

47. Potpourri 300 The two regions are the nucleus and the electron cloud. The electron cloud constitutes most of the volume of the atom and is mostly empty space. The nucleus contains most of the atom’s mass.

48. 400 Potpourri A reaction between 46 g of sodium and 71g of chlorine will produce how much salt? Answer Answer

49. Potpourri 400 Answer 117 g (Law of Conservation of Mass)

50. 500 Potpourri Give chemical formulas of two compounds which support the Law of Multiple Proportions. Answer Answer

51. Potpourri 500 Answer CO 2 and CO Also, H 2 O and H 2 O 2 (Same elements can combine in different whole number ratios to form different compounds)

52. Final Jeopardy What is the mass of exactly one iron atom? Answer

53. Final Jeopardy Answer First convert one atom to moles. ? Mole = 1 atom X 1 mole = 1.6611 x10 -24 mol 6.02 x 10 23 atoms Then convert moles to grams using molar mass. ? g = 1.6611 x10 -24 mol X 55.85 g = 9.28 x 10 -23 g mole