<p>Chemistry I: 3-4 Practice and Review Name______</p><p>Changes in the Nucleus Period______Date______</p><p>1. Nuclear reactions change the composition of an atom’s ______. 2. The attractive force that overcomes the electric repulsion between protons is the ______force. 3. Almost all the atoms you encounter have ______nuclei. 4. All nuclei with atomic numbers greater than 83 are ______. 5. Alpha, beta and gamma radiation are distinguished by their charge, ______, and penetrating power. 6. When an atom emits alpha, beta or gamma radiation, it is undergoing ______decay.</p><p>Answer each of the following in the space provided:</p><p>7. Why is carbon dating not useful for artifacts made entirely of metal? ______</p><p>8. Compare the penetrating power of alpha, beta and gamma radiation: ______</p><p>9. Why do nuclei need neutrons to be stable? ______</p><p>10. List 2 types of nuclear reactions other than radioactive decay: ______</p><p>11. In any radioactive decay, the sum of the mass numbers and atomic numbers must be ______before and after the reaction.</p><p> a) greater b) the same c) less d) unpredictable</p><p>12. The most dangerous form of radiation to the human body is</p><p> a) beta radiation b) gamma radiation c) alpha radiation d) They are equally dangerous</p><p>13. To be stable, atoms with more than 20 protons need increasingly more</p><p> a) neutrons than protons c) electrons than neutrons b) electrons than protons d) protons than neutrons</p><p>14. The sun produces energy by means of </p><p> a) gamma radiation b) beta decay c) alpha decay d) nuclear fusion 226 222 15. 88Ra 86 Rn + ______</p><p>14 14 16. 6C 7 N + ______</p><p>274 12 17. __ Al + __ He 6 C + ______</p><p>Write a nuclear equation for the following reactions:</p><p>18. alpha decay of polonium-210 ______</p><p>3 19. beta decay of tritium ( 1H ) ______</p><p>20. alpha decay of thorium-230 ______</p><p>231 21. alpha decay of 91Pa ______</p><p>22. What particle bombards Beryllium-9 if it forms carbon-12 and neutrons? Write the equation:</p><p>______</p><p>165 23. beta decay of 61Pm ______</p><p>24. What isotope is bombarded with alpha particles to produce oxygen-17 and hydrogen-1? Write the </p><p> equation: </p><p>______</p><p>146 25. alpha decay of 62Sm ______</p><p>198 26. beta decay of 85At ______</p><p>27. Write the equation of the bombardment of boron-10 with neutrons to produce Li-7 and another particle. </p><p>______</p><p>152 28. beta decay of 54 Xe ______</p>