Unit 3: Atoms, Ions, Isotopes

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Unit 3Atoms, Ions, Isotopes Electron Config.

• Review

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• 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

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• c. Ernest Rutherford

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• 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

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• Answer B Robert Millikan

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

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• Answer E J.J. Thomson

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

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• Answer A John Dalton

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

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• Answer C Electron

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

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• Answer B Electron, Proton, Neutron

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• 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

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• ANSWER b. 8, 8, 8

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

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• ANSWER c. 121

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• 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

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• ANSWER b. 13, 10, 14

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

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• ANSWER Fe, 30 neutrons

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• 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

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• ANSWER d. the number of protons plus the number
  of neutrons per atom

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

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• ANSWER c. Mn

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

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• ANSWER a. Sc

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

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• ANSWER c. 6

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• 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

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• ANSWER c. 8

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

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• Answer C 7

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

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• Answer D 8

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

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• ANSWER d. 1s22s22p63s23p64s23d5

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

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• ANSWER e. Co

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• What element has the noble gas core electron
  configuration of Ar 4s23d8

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• Answer Ni

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• The orbital diagram for Oxygen

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• B

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Atomic Trends

• 1) Which atom has the highest ionization
  energy?
• Ca or Br

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Atomic Trends

• 1) Which atom has the highest ionization
  energy?
• Br

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Atomic Trends

• 2) Which atom has the highest
  electronegativity?
• F or Mg

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Atomic Trends

• 2) Which atom has the highest
  electronegativity?
• F

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Atomic Trends

• 3) Which atom has the highest ionization
  energy?
• Rb or Ca

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Atomic Trends

• 3) Which atom has the highest ionization
  energy?
• Ca

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Atomic Trends

• 4) Which atom has the highest
  electronegativity?
• O or Si

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Atomic Trends

• 4) Which atom has the highest
  electronegativity?
• O

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Atomic Trends

• 5) Which atom is the largest?
• P or F

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Atomic Trends

• 5) Which atom is the largest?
• P

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Atomic Trends

• 7) Which atom is the largest?
• Be or Ne

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Atomic Trends

• 7) Which atom is the largest?
• Be

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Atomic Trends

• 9) Arrange the following atoms in order of
• decreasing atomic size.
• Mg, Cs, Ne, He, N

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Atomic Trends

• 9) Arrange the following atoms in order of
• decreasing atomic size.
• Cs gt Mg gt N gt Ne gt He

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Atomic Trends

• 10) Arrange the following atoms in order of
  increasing ionization energy.
• Li, Na, Ne, O, N

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Atomic Trends

• 10) Arrange the following atoms in order of
  increasing ionization energy.
• Na lt Li lt N lt O lt Ne

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Atomic Trends

• 11) Arrange the following atoms in order of
• increasing electronegativity.
• F, Na, O, N, K

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Atomic Trends

• 11) Arrange the following atoms in order of
• increasing electronegativity.
• K lt Na lt N lt O lt F