Chemistry Chapter 2 Test

31 Questions | Total Attempts: 147

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Chemistry Chapter 2 Test!


Questions and Answers
  • 1. 
  • 2. 
    Select one of the following that are PHYSICAL changes:
    • A. 

      A bicycle changes color and it rusts

    • B. 

      Squishing a lemon to make lemonade

    • C. 

      Vinegar being added to baking soda and it fizzing occurs

    • D. 

      Roasting a S'more

  • 3. 
    A science teacher shows students a chunk of gold and a very thin sheet of gold.How would a picture of one atom from the chunk of gold compare to a picture of one atom from the thin sheet of gold?
    • A. 

      An atom in the chunk would be square and the atom in the thin sheet would be flat

    • B. 

      An atom in the chunk is rough, while an atom from the thin sheet is smooth

    • C. 

      The atoms in the chunk and the thin sheet would be the same.

    • D. 

      An atom in the chunk is natural, while an atom in the thin sheet would be produced by humans

  • 4. 
    Hydrogen, carbon and oxygen are added together in a closed container.After they are mixed, a chemical reaction takes place and a liquid is formed.How does the number of atoms after the reaction compare to the number of atoms before the reaction?
    • A. 

      The total number of atoms increases

    • B. 

      The total number of atoms remains the same, but the number of hydrogen atoms may change

    • C. 

      The total number of atoms remains the same

    • D. 

      The total number of atoms decreases

  • 5. 
    In one of our experiments, we tested several elements using different properties to see if we could find elements that could be grouped together if they share some properties. 
    • One of those properties that we tested was the ability to react with oxygen to make an "oxide" . Which of the following is true about this property?
    • A. 

      It is a physical property because you can test elements without changing them into something else.

    • B. 

      It is a chemical property because you can test elements without changing them into something else.

    • C. 

      It is a chemical property because when you can test it the element changed into something else.

    • D. 

      It is a physical property because when you can test it the element changed into something else.

  • 6. 
    Select ALL of the following that are PHYSICAL changes:
    • A. 

      Two vials of liquid are mixed and it begins to glow.

    • B. 

      Microwaving a piece of chicken

    • C. 

      Crumpling up an old quiz

    • D. 

      A basketball deflating

    • E. 

      Breaking a piƱata

  • 7. 
    Your teacher is up front showing you an orange object that she says will melt at 39oC that quickly turns whitewhile sitting in the air. The object is very malleable and bends in her hands. 
    • Which of the properties are chemical properties?
    • A. 

      The object is malleable

    • B. 

      The object turns white in the air

    • C. 

      The object will melt at 39oC

    • D. 

      The object is orange

  • 8. 
    Assume that you have the technology to cut a piece of gold into the smallest piece possible. What would you be left with? 
    • A. 

      A molecule of gold that you could see with a microscope

    • B. 

      There is no such thing as "smallest piece possible" because you could keep splitting it forever

    • C. 

      A single atom of gold that is too small to be seen

    • D. 

      Nothing, because there is nothing when you get that small

  • 9. 
    Who discovered energy levels?
    • A. 

      Rutherford

    • B. 

      Thomson

    • C. 

      Democritus

    • D. 

      Bohr

  • 10. 
    • A. 

      Most alpha particles will bounce off the iron

    • B. 

      The iron will stop the alpha particles

    • C. 

      Most of the particles will pass right through iron

    • D. 

      The alpha particles will knock out the iron particles

  • 11. 
    Compared to the charge and mass of a proton, an electron:
    • A. 

      Has the opposite charge and same mass

    • B. 

      Has the opposite charge and much less mass

    • C. 

      Has the same charge and same mass

    • D. 

      Has the same charge and much less mass

  • 12. 
    What did Niels Bohr say about the electrons in the atom?
    • A. 

      Electrons are concentrated in the center of the atom

    • B. 

      Electrons are spread evenly through the atom so they are equally spaced apart

    • C. 

      Electrons are in rings called "orbits", that circle the center of the atom

    • D. 

      None of the choices are true

    • E. 

      All of the choices are true

  • 13. 
    In the Cathode-Ray experiment, what name did Thomson give the particles that made up the beam?
    • A. 

      Electrons

    • B. 

      Nuetrons

    • C. 

      Protons

    • D. 

      Nucleolus

  • 14. 
    What did Ernest Rutherford help to discover?
    • A. 

      Neutrons

    • B. 

      Electrons

    • C. 

      Protons

    • D. 

      Atoms

    • E. 

      Nucleus

  • 15. 
    Determine the molar mass (formula mass) for B2(Cr2O7)3 
    • DON'T ROUND
  • 16. 
    Determine the molar mass (formula mass) for H2O: 
    • DON'T ROUND
  • 17. 
    Determine the molar mass (formula mass) for Ca(C2H3O2)2 
    • DON'T ROUND
  • 18. 
    Who's atom model is this?
    • A. 

      Bohr

    • B. 

      Rutherford

    • C. 

      Thomson

    • D. 

      Dalton

  • 19. 
    Who's atom model is this?
    • A. 

      Bohr

    • B. 

      Rutherford

    • C. 

      Thomson

    • D. 

      Dalton

  • 20. 
    Define Scientific Law
    • A. 

      Gives an explanation for your observations

    • B. 

      Tells what has been observed

  • 21. 
    Define Scientific Theory 
    • A. 

      Gives an explanation for your observations

    • B. 

      Tells what has been observed

  • 22. 
    Define Physical Property
    • A. 

      Measuring a property that does not change the chemical composition.

    • B. 

      Something undergoes a change in composition, a new substance is formed.

  • 23. 
    Define Chemical Property
    • A. 

      Measuring a property that does not change the chemical composition.

    • B. 

      Something undergoes a change in composition, a new substance is formed.

  • 24. 
    Which of the following have a mass of 1 amu?
    • A. 

      Proton

    • B. 

      All of the choices

    • C. 

      Neutron

    • D. 

      Electron

  • 25. 
    Which pair below are isotopes of each other?
    • A. 

      Carbon-12 and carbon-12

    • B. 

      Sodium-22 and magnesium-22

    • C. 

      Chromium-52 and carbon-12

    • D. 

      Carbon-12 and carbon-14

  • 26. 
    A fictional element has only two naturally occurring isotopes. The isotope with mass number 25 makes up 30% of that element on earth, and the isotope with mass number 27 makes up 70% of that element on earth. Which of these is closest to the atomic mass of this element?
    • A. 

      26.5

    • B. 

      25.5

    • C. 

      24.5

    • D. 

      27.5

  • 27. 
    Determine the number of each subatomic particle:
    • A. 

      Electrons = 5 Neutrons =6 Protons =5

    • B. 

      Electrons = 6 Neutrons =6 Protons =6

    • C. 

      Electrons = 6 Neutrons =6 Protons =5

  • 28. 
    How many valence electrons do atoms have in column 13 of the periodic table?
  • 29. 
    Write the electron configuration for Lr?
  • 30. 
    Give 7 patterns that show themselves on the periodic table:
  • 31. 
    Where are protons located on the atom?
    • A. 

      The outer orbits

    • B. 

      The center

    • C. 

      The electron cloud