Main Menu Print Back Name: ________________________ Class: ___________________ Date: __________ ID: A Chapter 14 Multi-format Test Modified True/False Indicate whether the statement is true or false. If false, change the identified word or phrase to make the statement true. ____ 1. Two negative charges will attract one another. _________________________ ____ 2. The smallest quantity of electric charge that can be found in ordinary matter is represented by the letter c. _________________________ ____ 3. The number of protons plus the number of neutrons in the nucleus of an atom is known as the mass number. _________________________ ____ 4. The tiny core of an atom containing most of the mass of the atom is the neutron. _________________________ ____ 5. The nucleus of an atom that spontaneously breaks up to emits particles or pure energy may be called radioactive. _________________________ ____ 6. The strongest force in the universe is gravity. _________________________ ____ 7. The proton’s mass number is equal and opposite to the electron’s. _________________________ Completion Complete each statement. Select the correct term to complete each sentence. There are extra terms in the list. alpha gamma 2 ions strong nuclear beta electromagnetic 8 electrons gravitational spectroscope isotopes 18 protons weak 8. Atoms having the same atomic number but different mass numbers are described as ____________________. 9. The radioactive decay of an atom resulting in the decrease in the atomic number with no change in the atomic mass is ____________________ decay. 10. Each element emits a characteristic pattern of ____________________ when viewed through a spectroscope. 11. The instrument used to separate the light given off by electrons into different colors is called a _________________________. 12. The number of electrons that may be held in the third energy level of an atom is ____________________. 1 Main Menu Print Back Name: ________________________ ID: A Matching Match each part of the atom with its identity from the list below. ____ ____ ____ ____ ____ 13. 14. 15. 16. 17. nucleus electron proton neutron energy level For the following element, match the letter with the type of information given. ____ 18. name of element ____ 19. symbol ____ 20. atomic number Short Answer 21. List the four forces found within atoms and rank them in order of decreasing strength. 22. Where would a particle with a charge of +e be found in an atom? 23. How many energy levels would be completely filled by an atom of neon (Ne)? How many electrons would be left over? 24. Of the three sub-atomic particles: electrons, protons and neutrons, which determines most of the properties of an element? 2 Main Menu Print Back Name: ________________________ ID: A 25. What is the evidence that electrons in atoms are only allowed to have specific amounts of energy? Problem 26. The mass number for an isotope of oxygen is 17 and the atomic number is 8. How many neutrons are present in this isotope of oxygen? 27. The diagram below represents the charge distribution of positive and negative charges in a body. What is the overall (net) charge on the object as it is pictured? Essay 28. Describe the difference between an electron and a proton. In your description tell (1) where each is found in the nucleus (2) the charge, if any, on each and (3) how their masses compare. 29. When a gas is heated, it may give off light. Explain how a scientist might identify the element or elements from which the gas is made. Other 30. Using the diagram below as a model, represent the electron energy levels of a fluorine atom, atomic number 9. 3 Main Menu Print Back ID: A Chapter 14 Multi-format Test Answer Section MODIFIED TRUE/FALSE 1. ANS: F, repel DIF: basic 2. ANS: F, e REF: section 14.1 DIF: basic 3. ANS: T 4. ANS: F, nucleus REF: section 14.1 DIF: basic REF: section 14.1 5. ANS: T 6. ANS: F strong nuclear force the strong nuclear force DIF: basic 7. ANS: F, charge DIF: intermediate DIF: basic REF: section 14.1 DIF: basic REF: section 14.1 REF: section 14.1 REF: section 14.1 COMPLETION 8. ANS: isotopes DIF: basic 9. ANS: alpha REF: section 14.1 DIF: intermediate REF: section 14.1 10. ANS: spectral lines DIF: basic REF: section 14.2 11. ANS: spectroscope DIF: basic 12. ANS: 8 DIF: intermediate REF: section 14.2 REF: section 14.2 MATCHING 13. ANS: C 14. ANS: E DIF: intermediate DIF: intermediate REF: section 14.1 REF: section 14.1 1 Main Menu Print Back ID: A 15. ANS: A 16. ANS: B 17. ANS: D DIF: intermediate DIF: intermediate DIF: intermediate REF: section 14.1 REF: section 14.1 REF: section 14.2 18. ANS: C 19. ANS: A 20. ANS: B DIF: basic DIF: basic DIF: basic REF: section 14.1 REF: section 14.1 REF: section 14.1 SHORT ANSWER 21. ANS: strong nuclear force (strongest) electromagnetic force weak force gravity (weakest) DIF: basic 22. ANS: In the nucleus. REF: section 14.1 DIF: intermediate REF: section 14.1 23. ANS: The neon atom has two filled energy levels and no electrons left over. DIF: intermediate 24. ANS: electrons REF: section 14.1 DIF: basic REF: section 14.2 25. ANS: When viewed through a spectrometer, only specific colors of light are given off by atoms. These specific colors correspond to specific amounts of energy. DIF: advanced REF: section 14.2 PROBLEM 26. ANS: The number of neutrons is the difference between the mass number and the atomic number; 9 neutrons DIF: intermediate 27. ANS: +10 - 6 = +4 DIF: intermediate REF: section 14.1 REF: section 14.1 2 Main Menu Print Back ID: A ESSAY 28. ANS: (1) The proton is found in the nucleus, the electron orbits outside the nucleus. (2) The proton has a positive charge and the electron a negative charge. (3) The proton is 1835 times more massive than the electron. DIF: basic REF: section 14.1 29. ANS: The light from the gas, when examined with a spectroscope, will produce a bright line spectrum. The spectrum for each element is unique to that element and allows the scientist to identify the elements in the gas. DIF: intermediate REF: section 14.2 intermediate REF: section 14.1 OTHER 30. ANS: DIF: 3 Main Menu Chapter 14 Multi-format Test [Answer Strip] F _____ 1. F _____ 2. T _____ 3. F _____ 4. T _____ 5. F _____ 6. C _____ E _____ A _____ B _____ D _____ 13. 14. 15. 16. 17. F _____ 7. C 18. _____ A 19. _____ B 20. _____ Print Back ID: A