Standard+2+Part+2+Isotopes+Ions+and+Nuclear+Reactions


 * Standard 2, Part 2: Essential Questions **

** 47. ** How would you determine the number of protons, neutrons, and electrons when given the symbol for the isotope of an element? ** 48. ** How would you write the symbol for an isotope when given the mass number and the number of neutrons? ** 49. ** What is the basis for chemical stability? ** 50. ** What parts of an atom are involved in chemical reactions? ** 51. ** How do chemical reactions affect the number of protons and neutrons in an atom? ** 52. ** What will atoms do to achieve chemical stability? ** 53. ** How do you predict the number of electrons an atom of a given element will gain or lose in order to most readily reach chemical stability? ** 54. ** What is the most likely method for achieving stability in Groups 13 – 15? In groups 3 – 12? ** 55. ** What is an ion? ** 56. ** How is a positive ion formed? A negative ion? ** 57. ** Are ions chemically stable? Why? ** 58. ** What is the most likely way metals will achieve chemical stability? ** 59. ** What is the most likely way nonmetals will achieve chemical stability? ** 60. ** What is a chemically unstable atom? ** 61. ** What is a compound?* ** 62. ** What parts of the atom are involved in nuclear reactions? How does this compare with chemical reactions? ** 63. ** How does the energy exchange in nuclear reactions compare to the energy exchange in chemical reactions? ** 64. ** What is the step-by-step process of nuclear fission? ** 65. ** What is a chain reaction? ** 66. ** What is a critical mass? ** 67. ** What are the uses of nuclear fission? ** 68. ** How does the mass of the products of a fission reaction compare with the mass of the reactants? ** 69. ** What equation is used to account for mass lost in a nuclear (fission or fusion) reaction? ** 70. ** What is nuclear fusion? ** 71. ** How does the mass of the products of a fusion reaction compare with the mass of the reactants? ** 72. ** Which type of nuclear reaction occurs in the Sun (and other stars)? ** 73. ** What are the prospects for (and obstacles to) using nuclear fusion as an energy source? ** 74. ** What type of nuclear weapon uses nuclear fusion? ** 75. ** What are the consequences (+ and -) of the use of nuclear fission? 76. 77. 78. 79. 80. ** What are the benefits and drawbacks of using nuclear technology to produce electricity? ***