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5 Written Questions

4 Matching Questions

  1. a carbon atom
  2. random motions of atoms and molecules
  3. electrons
  4. helium
  1. a 5) An atomic mass unit (amu) is 1/12 the mass of
    A) an electron.
    B) a proton.
    C) a hydrogen atom.
    D) a carbon atom.
    E) a uranium atom.
  2. b 41) If one neutron is added to a helium nucleus, the result is
    A) hydrogen.
    B) boron.
    C) lithium.
    D) beryllium.
    E) helium.
  3. c 11) Brownian motion has to do with the
    A) size of atoms.
    B) atomic vibrations.
    C) first direct measurement of atomic motion.
    D) random motions of atoms and molecules.
    E) rhythmic movements of atoms in a liquid.
  4. d 30) The volume of matter comes mostly from its
    A) protons.
    B) electrons.
    C) neutrons

5 Multiple Choice Questions

  1. 40) If a pair of helium nuclei are fused together, the result is
    A) helium isotope.
    B) lithium.
    C) beryllium.
    D) boron.
    E) carbon.
  2. 27) Compared to the atoms that make up the body of an elderly person, the atoms that make up the body of a newborn baby are
    A) newer.
    B) actually older.
    C) the same age.
  3. 29) The weight of matter comes mostly from its
    A) protons.
    B) electrons.
    C) neutrons
  4. 22) When carbon and oxygen atoms combine, energy is
    A) taken in by the reaction.
    B) given off by the reaction.
    C) not involved.
  5. 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

5 True/False Questions

  1. ancient stars26) Nuclei of atoms that make up a newborn baby were made in
    A) the mother's womb.
    B) the food the mother eats before giving birth.
    C) ancient stars.
    D) the Earth.
    E) none of these

          

  2. the whole world3) 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. single breath35) If a gram of antimatter meets a kilogram of matter, the amount of mass to survive is
    A) 1 gram.
    B) 999 grams.
    C) 1 kilogram.
    D) 1.1 kilogram.

          

  4. mostly empty space themselves28) The reason a granite block is mostly empty space is that the atoms in the granite are
    A) in perpetual motion.
    B) mostly empty space themselves.
    C) held together by electrical forces.
    D) not as close together as they could be.
    E) invisible.

          

  5. of electrical forces17) 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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