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Unit 3 : Atoms, Ions, Isotopes & Electron Config.

Unit 3 : Atoms, Ions, Isotopes & Electron Config. Review. The scientist whose alpha-particle scattering experiment led him to conclude that the nucleus of an atom contains a dense center of positive charge is (gold foil experiment) a. J. J. Thomson b. Robert Millikan c. Ernest Rutherford

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Unit 3 : Atoms, Ions, Isotopes & Electron Config.

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  1. Unit 3:Atoms, Ions, Isotopes & Electron Config. Review

  2. The scientist whose alpha-particle scattering experiment led him to conclude that the nucleus of an atom contains a dense center of positive charge is (gold foil experiment) a. J. J. Thomson b. Robert Millikan c. Ernest Rutherford d. William Thomson e. James Chadwick

  3. c. Ernest Rutherford

  4. A scientist whose “Oil drop experiment” discovered that atoms had positive and negative charges and that they equal each other a. J. J. Thomson b. Robert Millikan c. Ernest Rutherford d. William Thomson e. James Chadwick

  5. Answer: B: Robert Millikan

  6. He made their discovery using cathode ray tubes. a. Niels Bohr b. Robert Millikan c. Ernest Rutherford d. Erwin Schrodinger e. J.J. Thomson

  7. Answer: E: J.J. Thomson

  8. He developed the first atomic theory of matter. a. John Dalton b. Robert Millikan c. Henry Mosely d. Erwin Schrodinger e. James Chadwick

  9. Answer: A: John Dalton

  10. This atomic particle determines the chemical property of an element. a. Proton b. Neutron c. Electron d. Isotope

  11. Answer: C: Electron

  12. The order in which the subatomic particles were discovered: • Proton, Neutron, Electron • Electron, Proton, Neutron • Neutron, Electron, Proton • Proton, Electron, Neutron

  13. Answer: B: Electron, Proton, Neutron

  14. How many protons, electrons, and neutrons, respectively, does 16 8O have? • a. 8, 18, 8 • b. 8, 8, 8 • c. 8, 10, 8 • d. 8, 14, 8 • e. 8, 18, 16

  15. ANSWER: b. 8, 8, 8

  16. The number of neutrons in one atom of Hg is • a. 82 • b. 206 • c. 121 • d. 288 • e. none of these

  17. ANSWER: c. 121

  18. How many protons, electrons, and neutrons, respectively, does Al3+ have? • a. 13, 13, 14 • b. 13, 10, 14 • c. 13, 13, 27 • d. 13, 10, 27 • e. 13, 13, 13

  19. ANSWER: b. 13, 10, 14

  20. What is the element and number of neutrons for an element with atomic number 26 and mass number 56?

  21. ANSWER: Fe, 30 neutrons

  22. The mass number of an atom equals a. the number of neutrons per atom b. the atomic mass of the element c. the atomic number of the element d. the number of protons plus the number of neutrons per atom e. none of these

  23. ANSWER: d. the number of protons plus the number of neutrons per atom

  24. Which of the following has the electron configuration 1s22s22p63s23p64s23d5? • a. Cr • b. Ca • c. Mn • d. Br • e. none of these

  25. ANSWER: c. Mn

  26. Which of the following atoms has the electron configuration 1s22s22p63s23p64s23d1? • a. Sc • b. Ca • c. Sr • d. Ar • e. none of these

  27. ANSWER: a. Sc

  28. How many d electrons are there in a iron atom? • a. 2 • b. 3 • c. 6 • d. 26 • e. 56

  29. ANSWER: c. 6

  30. The maximum number of electrons in the second principal energy level of an atom is (think: Bohr diagram) • a. 2 • b. 6 • c. 8 • d. 18 • e. 32

  31. ANSWER: c. 8

  32. Halogen Family contain how many valence electrons? • 1 • 5 • 7 • 8

  33. Answer C: 7

  34. Noble Gases contain how many valence electrons? • 1 • 5 • 7 • 8

  35. Answer D: 8

  36. The correct electron configuration for Mn is • a. 1s22s22p63s23p63d7 • b. 1s22s22p63s23p64s23d6 • c. 1s22s22p62d103s23p3 • d. 1s22s22p63s23p64s23d5 • e. none of these

  37. ANSWER: d. 1s22s22p63s23p64s23d5

  38. 1s22s22p63s23p64s23d7 is the electron configuration for which of the following atoms? • a. Ca • b. Fe • c. Cr • d. Ar • e. Co

  39. ANSWER: e. Co

  40. What element has the noble gas core electron configuration of [Ar] 4s23d8

  41. Answer: Ni

  42. The orbital diagram for Oxygen

  43. B

  44. Atomic Trends • 1) Which atom has the highest ionization energy? • Ca or Br

  45. Atomic Trends • 1) Which atom has the highest ionization energy? • Br

  46. Atomic Trends • 2) Which atom has the highest electronegativity? • F or Mg

  47. Atomic Trends • 2) Which atom has the highest electronegativity? • F

  48. Atomic Trends • 3) Which atom has the highest ionization energy? • Rb or Ca

  49. Atomic Trends • 3) Which atom has the highest ionization energy? • Ca

  50. Atomic Trends • 4) Which atom has the highest electronegativity? • O or Si

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