1. Radioactive Decay Problems #1

2. 1. What is the mass number of Radium-226?

3. 226

4. 2. What is the atomic number of Radium-226?

5. 88

6. 3. What is the correct symbol for Radium-226?

7. 226 88 Ra

8. Radium-226 undergoes alpha decay.

9. 4. What is the mass number of the new isotope?

10. 222

11. 5. What is the atomic number of the new isotope?

12. 86

13. 6. What is the correct symbol for the new isotope?

14. 222 86 Rn

15. 7. What is the name of the new isotope?

16. Radon-222

17. 8. What is the mass number of Thorium-234?

18. 234

19. 9. What is the atomic number of Thorium-234?

20. 90

21. 10. What is the correct symbol for Thorium-234?

22. 234 90 Th

23. Thorium-234 undergoes beta decay.

24. 11. What is the mass number of the new isotope?

25. 234

26. 12. What is the atomic number of the new isotope?

27. 91

28. 13. What is the correct symbol for the new isotope?

29. 234 91 Pa

30. 14. What is the name of the new isotope?

31. Protactinium- 234

32. 15. What is the mass number of Plutonium-238?

33. 238

34. 16. What is the atomic number of Plutonium-238?

35. 94

36. 17. What is the correct symbol for Plutonium-238?

37. 238 94 Pu

38. Plutonium-238 undergoes alpha decay.

39. 18. What is the mass number of the new isotope?

40. 234

41. 19. What is the atomic number of the new isotope?

42. 92

43. 20. What is the correct symbol for the new isotope?

44. 234 92 U

45. 21. What is the name of the new isotope?

46. Uranium-234

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

48. 210

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

50. 83

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

52. 210 83 Bi

53. Bismuth-210 undergoes beta decay.

54. 25. What is the mass number of the new isotope?

55. 210

56. 26. What is the atomic number of the new isotope?

57. 84

58. 27. What is the correct symbol for the new isotope?

59. 210 84 Po

60. 28. What is the name of the new isotope?

61. Polonium-210

62. 29. What is the mass number of Uranium-234?

63. 234

64. 30. What is the atomic number of Uranium-234?

65. 92

66. 31. What is the correct symbol for Uranium-234?

67. 234 92 U

68. Uranium-234 undergoes alpha decay.

69. 32. What is the mass number of the new isotope?

70. 230

71. 33. What is the atomic number of the new isotope?

72. 90

73. 34. What is the correct symbol for the new isotope?

74. 230 90 Th

75. 35. What is the name of the new isotope?

76. Thorium-230

77. 36. What is the mass number of Cesium-137?

78. 137

79. 37. What is the atomic number of Cesium-137?

80. 55

81. 38. What is the correct symbol for Cesium-137?

82. 137 55 Cs

83. Cesium-137 undergoes beta decay.

84. 39. What is the mass number of the new isotope?

85. 137

86. 40. What is the atomic number of the new isotope?

87. 56

88. 41. What is the correct symbol for the new isotope?

89. 137 56 Ba

90. 42. What is the name of the new isotope?

91. Barium-137

92. 43. What is the mass number of Polonium-214?

93. 214

94. 44. What is the atomic number of Polonium-214?

95. 84

96. 45. What is the correct symbol for Polonium-214?

97. 214 84 Po

98. Polonium-214 undergoes alpha decay.

99. 46. What is the mass number of the new isotope?

100. 210

101. 47. What is the atomic number of the new isotope?

102. 82

103. 48. What is the correct symbol for the new isotope?

104. 210 82 Pb

105. 49. What is the name of the new isotope?

106. Lead-210

107. 50. What is the mass number of Protactinium-234?

108. 234

109. 51. What is the atomic number of Protactinium-234?

110. 91

111. 52. What is the correct symbol for Protactinium-234?

112. 234 91 Pa

113. Protactinium- 234 undergoes beta decay.

114. 53. What is the mass number of the new isotope?

115. 234

116. 54. What is the atomic number of the new isotope?

117. 92

118. 55. What is the correct symbol for the new isotope?

119. 234 92 U

120. 56. What is the name of the new isotope?

121. Uranium-234