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Name _______________________ Date _____________ Period ____ FILL IN THE CHART WITH THE MISSING VALUES ATOM / ION ATOMIC # ATOMIC MASS Copper 29 65 4. ? Phosphide ion 5. ? 15 6. 8. ? ? # OF PROTONS 1. ? # OF ELECTRONS 2. 74 9. ? ? # OF NEUTRONS 3. CHARGE ? 74 18 112 16 7. 10. For the following nuclear equations find the missing information 11. Np + 6Li a. 244Pu b. 244Am 238 1 H c. d. 12. 14C 14N + _?_ a. proton b. neutron 13. 238U a. 232 b. 234 4 He + + ______ 234 243 Pu Am c. alpha d. beta ? Th c. 236 d. 242 14. Why are many of the masses listed on the period table decimal numbers? a. The masses of the electrons are less than one b. The numbers are actually weighted averages of the isotopes c. Some of the atomic mass has been destroyed d. Scientists are unsure of the actual mass 15. The gold foil experiment provided evidence of all of the following except: a. The nucleus of an atom is very small b. Atoms are mostly empty space c. Electrons have a very small mass d. The nucleus of an atom is very dense 16. To find the atomic mass of an atom: a. Count the protons b. Add the number of protons and number of neutrons c. Add the atomic number and number of protons d. Add the electrons and protons 17. Atoms are electrically neutral because: a. The charge of the electrons is balanced by the charge of the protons b. Neutrons prevent the existence of any charge c. The charge on all of the subatomic particles is already zero d. The charge of the protons is balanced by the charge of the neutrons 18. A sample of Strontium 90 undergoes radioactive decay by emitting an alpha particle. The remaining atom is: a. Yttrium 90 c. Rubidium 88 b. Krypton 86 d. Rubidium 86 0 ? ? 19. The smallest piece of matter that retains all of the properties of the matter is a/an: a. Proton c. Neutron b. Atom d. Electron MATCHING: match the word to the definition, some words are not used. 20. A large atom splits into smaller atoms and releases some energy 21. Energy released by atoms 22. Having the same number of protons but a different number of neutrons 23. Contains nearly all of the mass of an atom 24. Having an unstable nucleus ISOTOPE FISSION FUSION RADIATION NUCLEUS RADIOACTIVE ELECTRON CONSIDER THE IMAGE BELOW FOR THE FOLLOWING QUESTIONS X Y Z 25. Which of the following types of radiation is a beta particle? a. Type X b. Type Y c. Type Z 26. Which particle(s) are affected by magnets? a. X only b. X and Y c. Y and Z d. X, Y, and Z 27. If an atom emits an alpha particle, its atomic number will: a. Increase c. Stay the same b. Decrease d. Become negative 28. Different elements never have the same number of: a. Electrons c. Neutrons b. Protons d. Isotopes 29. In the isotopes of pennium lab, the pennies represented a. Individual Atoms c. Radioactive decay b. Individual elements d. Copper 30. The primary force that prevents the nucleus of an atom from flying apart is: a. Gravity c. The strong nuclear force b. The electrostatic force d. The weak nuclear force 32. Radioactive elements change into different elements as time goes by. a. True b. False 33. Natural gallium is found to be 60.1% 69Ga and 39.9% 71Ga. What is the average weighted atomic mass for Gallium? a. 63.3 amu b. 69.8 amu c. 70.2 amu d. 73.0 amu 34. How many electrons does an atom of strontium have in its last energy level? a. One b. Two c. Three d. Four 35. how many electrons does an atom of argon have in its last energy level? a. Two b. Four c. Six d. Eight 36. How many energy levels does an atom of silver have? a. Two b. Three c. Four d. Five 37. The experiment that discovered the electron a. Cathode ray tube b. Oil drop experiment c. Gold foil experiment 38. The experiment that discovered that the nucleus of atoms is charged a. Cathode ray tube b. Oil drop experiment c. Gold foil experiment