2. Science 9 Decay Problems #3
56 point total
Each answer 1 pt. each except for symbols which are 3 pt. each.

3. 1. What is the mass number of Astatine-218?

4. 2. What is the atomic number of Astatine-218?85

5. 3. What is the correct symbol for Astatine-218?85

6. Astatine-218 undergoes alpha decay.

7. 4. What is the mass number of the new isotope?
214

8. 5. What is the atomic number of the new isotope?83

9. 6. What is the correct symbol for the new isotope?Bi
214 83

10. 7. What is the name of the new isotope?
Bismuth-214

11. 8. What is the mass number of Lead-210?

12. 9. What is the atomic number of Lead-210?82

13. 10. What is the correct symbol for Lead-210?Pb
210 82

14. Lead-210 undergoes beta decay.

15. 11. What is the mass number of the new isotope?
210

16. 12. What is the atomic number of the new isotope?83

17. 13. What is the correct symbol for the new isotope?Bi
210 83

18. 14. What is the name of the new isotope?
Bismuth-210

19. 15. What is the mass number of Seaborgium-263?

20. 16. What is the atomic number of Seaborgium-263?
106

21. 17. What is the correct symbol for Seaborgium-263?Sg
263
106

22. Seaborgium-263 undergoes alpha decay.

23. 18. What is the mass number of the new isotope?
259

24. 19. What is the atomic number of the new isotope?
104

25. 20. What is the correct symbol for the new isotope?Rf
259
104

26. 21. What is the name of the new isotope?
Rutherfordium-259

27. 22. What is the mass number of Bismuth-210?

28. 23. What is the atomic number of Bismuth-210?83

29. 24. What is the correct symbol for Bismuth-210?83

30. Bismuth-210 undergoes beta decay.

31. 25. What is the mass number of the new isotope?
210

32. 26. What is the atomic number of the new isotope?84

33. 27. What is the correct symbol for the new isotope?Po
210 84

34. 28. What is the name of the new isotope?
Polonium-210

35. 29. What is the mass number of Protactinium-231?

36. 30. What is the atomic number of Protactinium-231?91

37. 31. What is the correct symbol for Protactinium-231?Pa
231 91

38. Protactinium-231 undergoes alpha decay.

39. 32. What is the mass number of the new isotope?
227

40. 33. What is the atomic number of the new isotope?89

41. 34. What is the correct symbol for the new isotope?Ac
227 89

42. 35. What is the name of the new isotope?
Actinium-227

43. 36. What is the mass number of Actinium-227?

44. 37. What is the atomic number of Actinium-227?89

45. 38. What is the correct symbol for Actinium-227?89

46. Actinium-227 undergoes beta decay.

47. 39. What is the mass number of the new isotope?
227

48. 40. What is the atomic number of the new isotope?90

49. 41. What is the correct symbol for the new isotope?
227 90

50. 42. What is the name of the new isotope?
Thorium-227

51. 43. What is the mass number of Samarium-149?

52. 44. What is the atomic number of Samarium-149?62

53. 45. What is the correct symbol for Samarium-149?Sm
149 62

54. Samarium-149 undergoes alpha decay.

55. 46. What is the mass number of the new isotope?
145

56. 47. What is the atomic number of the new isotope?60

57. 48. What is the correct symbol for the new isotope?Nd
145 60

58. 49. What is the name of the new isotope?
Neodymium-145

59. 50. What is the mass number of Polonium-210?

60. 51. What is the atomic number of Polonium-210?84

61. 52. What is the correct symbol for Polonium-210?84

62. Polonium-210 undergoes beta decay.

63. 53. What is the mass number of the new isotope?
210

64. 54. What is the atomic number of the new isotope?85

65. 55. What is the correct symbol for the new isotope?
210 85

66. 56. What is the name of the new isotope?
Astatine-210