Exam 5 - Regular Chemistry - Krug

30 Questions | Total Attempts: 57

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Chemistry Quizzes & Trivia

An exam over nuclear chemistry and molecular shape.


Questions and Answers
  • 1. 
     is the symbol for which of the following?
    • A. 

      Alpha particle

    • B. 

      Beta particle

    • C. 

      Gamma ray

    • D. 

      Positron

  • 2. 
    is the symbol for which of the following types of ionizing radiation?
    • A. 

      Beta particle

    • B. 

      Neutron

    • C. 

      Gamma ray

    • D. 

      Positron

  • 3. 
    The type of radiation with the symbol  can be stopped with which of the following?
    • A. 

      A sheet of paper

    • B. 

      A piece of plywood

    • C. 

      A thick lead wall

    • D. 

      A thin sheet of aluminum

  • 4. 
    If a radioactive isotope has a half-life of 30 minutes, how long will it take for its amount to drop from 100 grams down to 25 grams?
    • A. 

      120 minutes

    • B. 

      30 minutes

    • C. 

      60 minutes

    • D. 

      90 minutes

  • 5. 
    A radioactive isotope decreases from 60 grams down to 7.5 grams over a period of 100 seconds.  Calculate the isotope's half-life.
    • A. 

      33.3 seconds

    • B. 

      25 seconds

    • C. 

      12.5 seconds

    • D. 

      50 seconds

  • 6. 
    Fill in the missing particle in the following nuclear decay process:
    • A. 
    • B. 
    • C. 

    • D. 

  • 7. 
    Fill in the missing particle in the following nuclear decay process:
    • A. 
    • B. 
    • C. 
    • D. 
  • 8. 
    A radioactive nuclide has 17 protons and 19 neutrons.  Its symbol is
    • A. 
    • B. 
    • C. 
    • D. 
  • 9. 
    Most of an average American's radiation comes from which of the following sources?
    • A. 

      Atomic fallout

    • B. 

      Microwave ovens

    • C. 

      Natural sources

    • D. 

      X-rays

  • 10. 
    A radiation dose of 5 rem in a human would most likely result in
    • A. 

      Nothing

    • B. 

      Nausea and vomiting

    • C. 

      Superhero abilities

    • D. 

      Death

  • 11. 
    The average American is exposed to how much radiation over the course of one year?
    • A. 

      More than 1000 rem

    • B. 

      100 rem

    • C. 

      10 rem

    • D. 

      Less than 1 rem

  • 12. 
    The diagram below represents what nuclear process?
    • A. 

      Neutron capture

    • B. 

      Nuclear fusion

    • C. 

      Nuclear fission

    • D. 

      Beta decay

  • 13. 
    A radioactive gas that often leaks into basements, causing lung cancer, is
    • A. 

      Plutonium

    • B. 

      Uranium

    • C. 

      Xenon

    • D. 

      Radon

  • 14. 
    Nuclear fusion commonly takes places in
    • A. 

      Nuclear power plants

    • B. 

      The sun and stars

    • C. 

      Smoke detectors

    • D. 

      Vehicle exhaust pipes

  • 15. 
    The amount of time required for the amount of a radioactive isotope to be reduced by half is called its
    • A. 

      Half time

    • B. 

      Half life

    • C. 

      Half sleeve

    • D. 

      Half pint

  • 16. 
    A high-powered electron emitted by a radioactive nucleus is called a
    • A. 

      Beta particle

    • B. 

      Alpha particle

    • C. 

      Gamma ray

    • D. 

      Neutron

  • 17. 
    Nuclear power plants most commonly use which radioactive element?
    • A. 

      Carbon

    • B. 

      Polonium

    • C. 

      Radon

    • D. 

      Uranium

  • 18. 
    How many valence electrons are found in a typical atom of fluorine?
    • A. 

      1

    • B. 

      2

    • C. 

      7

    • D. 

      8

  • 19. 
    Which of the following elements is an exception to the octet rule?
    • A. 

      Carbon

    • B. 

      Silicon

    • C. 

      Sulfur

    • D. 

      Hydrogen

  • 20. 
    In the molecule , which is the central atom?
    • A. 

      Hydrogen

    • B. 

      Nitrogen

    • C. 

      Neon

    • D. 

      Helium

  • 21. 
    The molecule  has two correct Lewis electron-dot structures.  These two structures are called
    • A. 

      Resonance structures

    • B. 

      Nuclear isotopes

    • C. 

      Isomers

    • D. 

      Enantiomers

  • 22. 
    The correct structural formula for CH2O is Hint:  Carbon is the central atom.
    • A. 

        

    • B. 
    • C. 
    • D. 
  • 23. 
    The correct structural formula for is: Hint:  Carbon is the central atom.
    • A. 
    • B. 
    • C. 
    • D. 
  • 24. 
    Every single bond in a molecule will contain how many electrons?
    • A. 

      One

    • B. 

      Two

    • C. 

      Four

    • D. 

      Eight

  • 25. 
    In the molecule N2O, what is the total number of valence electrons that should appear in the electron-dot structure?
    • A. 

      8

    • B. 

      16

    • C. 

      24

    • D. 

      17

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