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5 Written questions

5 Matching questions

  1. a quark
  2. thermonuclear fusion
  3. orbital electrons
  4. all of these
  5. lead
  1. a 14) In an electrically neutral atom, the number of protons in the nucleus is balanced by an equal number of
    A) neutrons.
    B) quarks.
    C) orbital electrons.
    D) all of these
    E) none of these
  2. b 19) Which has the greatest number of protons in its nucleus?
    A) gold.
    B) mercury.
    C) lead.
    D) silver.
  3. c 20) The air in this room has
    A) mass.
    B) weight.
    C) energy.
    D) all of these
    E) none of these
  4. d 4) Atoms heavier than helium were made by
    A) photosynthesis.
    B) thermonuclear fusion.
    C) radiant energy conversion.
    D) radioactivity.
    E) none of these
  5. e 15) The smallest particle of those listed below is
    A) a molecule.
    B) an atom.
    C) a proton.
    D) a neutron.
    E) a quark.

5 Multiple choice questions

  1. 21) Compared to the energy it takes to separate oxygen and hydrogen from water, the amount of energy given off when they recombine is
    A) slightly more.
    B) slightly less.
    C) much more.
    D) much less.
    E) the same.
  2. 3) There are about as many atoms of air in our lungs at any moment as there are breaths of air in the atmosphere of
    A) a large auditorium.
    B) a large city.
    C) the United States.
    D) the whole world.
    E) none of these
  3. 39) If two protons are added to an oxygen nucleus, the result is
    A) heavy oxygen.
    B) fluorine.
    C) neon.
    D) sodium.
    E) nitrogen.
  4. 32) Compared to the mass of a hydrogen atom, the mass of an oxygen atom is
    A) 8 times as great.
    B) 12 times as great.
    C) 16 times as great.
    D) appreciably more than 16 times as great.
  5. 29) The weight of matter comes mostly from its
    A) protons.
    B) electrons.
    C) neutrons

5 True/False questions

  1. mostly empty space themselves33) In a closed bottle are a certain number of hydrogen molecules. In an identical closed bottle at the same temperature and internal pressure are a certain number of nitrogen molecules. The bottle with the greater number of molecules is the one containing
    A) hydrogen.
    B) nitrogen.
    C) both the same


  2. uranium41) If one neutron is added to a helium nucleus, the result is
    A) hydrogen.
    B) boron.
    C) lithium.
    D) beryllium.
    E) helium.


  3. neutron31) The chemical properties of matter come mostly from its
    A) protons.
    B) electrons.
    C) neutrons.


  4. a carbon atom37) If two protons are removed from an oxygen nucleus, the result is
    A) nitrogen.
    B) carbon.
    C) helium.
    D) neon.
    E) positively charged oxygen.


  5. electrical force17) Solid matter is mostly empty space. The reason solids don't fall through one another is because
    A) atoms are constantly vibrating, even at absolute zero.
    B) of nuclear forces.
    C) of gravitational forces.
    D) of electrical forces.
    E) none of these


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