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Chapter 3 Review

Chapter 3 Review. When alpha particles are used to bombard gold foil, most of the alpha particles pass through undeflected. This result indicates that most of the volume of a gold atom consists of ____. Protons Neutrons Electrons Unoccupied space.

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Chapter 3 Review

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  1. Chapter 3 Review

  2. When alpha particles are used to bombard gold foil, most of the alpha particles pass through undeflected. This result indicates that most of the volume of a gold atom consists of ____. • Protons • Neutrons • Electrons • Unoccupied space

  3. What is the mass, in grams, of 3 x 1023 atoms of helium? • 1.2 x 1024 grams • 2 grams • 3 x 1023 grams • 8 grams

  4. Which symbols represent atoms that are isotopes? • C-14 and N-14 • O-16 and O-18 • I-131 and I-131 • Rn-222 and Ra-222

  5. Which of the following is not one of Dalton’s laws? • Atoms are indestructible. • Atoms of the same element have isotopes with different masses. • Atoms of different elements have different chemical and physical properties. • All of these are examples of Dalton’s laws.

  6. Approximately how many atoms of carbon are present in a 120 gram sample of carbon? • 6 x 1024 atoms • 1440 atoms • 10 atoms • 6 x 1022 atoms

  7. The number of protons, electrons and neutrons in 80Br - • 35, 34, 45 • 35, 36, 45 • 35, 35, 80 • 35, 36, 80

  8. How many moles of CO2 are present in 220 mg? • 5 moles • .005 moles • 5000 moles • 10 moles

  9. If the abundance of 6X (6.015121 amu) is 7.500% and the abundance of 7X (7.016003 amu) is 92.500%, what is the average atomic mass? • 6.0750 amu • 6.0902 amu • 6.9250 amu • 6.9409 amu

  10. J.J. Thomson’s experiments provided evidence that an atom • is the smallest particle of matter. • contains negatively charged particles. • has a negative charge. • has a positive charge.

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