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5 Written Questions

5 Matching Questions

  1. electrical force
  2. neutron
  3. 16 times as great
  4. electrons
  5. None of the above is true
  1. a 18) A force that determines the chemical properties of an atom is a(n)
    A) friction force.
    B) nuclear force.
    C) gravitational force.
    D) electrical force.
    E) none of these
  2. b 30) The volume of matter comes mostly from its
    A) protons.
    B) electrons.
    C) neutrons
  3. c 38) To change mercury into gold, a pair of protons must be
    A) removed from the mercury nucleus.
    B) added to the mercury nucleus.
    C) removed from the gold nucleus
    D) added to the gold nucleus.
    E) None of the above is true.
  4. d 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. e 2) Which of the following are electrically neutral?
    A) proton
    B) neutron
    C) electron
    D) ion
    E) none of these

5 Multiple Choice Questions

  1. 28) 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.
  2. 22) When carbon and oxygen atoms combine, energy is
    A) taken in by the reaction.
    B) given off by the reaction.
    C) not involved.
  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. 16) A molecule has
    A) mass.
    B) structure.
    C) energy.
    D) all of these
    E) none of these
  5. 36) What is the molecular mass of a water molecule?
    A) 10 amu
    B) 12 amu
    C) 15 amu
    D) 18 amu
    E) None of these. It depends on the temperature.

5 True/False Questions

  1. lead19) Which has the greatest number of protons in its nucleus?
    A) gold.
    B) mercury.
    C) lead.
    D) silver.


  2. 242) How many protons should be added to the nuclei of oxygen atoms so the resulting gas will glow red when there is an electric current through it?
    A) 1
    B) 2
    C) 3
    D) 4
    E) But protons will have to be subtracted, not added.


  3. short-lived24) In our part of the universe, antimatter is
    A) non-existent.
    B) plentiful.
    C) short-lived.
    D) long-lived.


  4. beryllium40) If a pair of helium nuclei are fused together, the result is
    A) helium isotope.
    B) lithium.
    C) beryllium.
    D) boron.
    E) carbon.


  5. There are only about 100 different kinds of atoms that combine to form all substances9) Which of the following statements is true?
    A) An atom is the smallest particle known to exist.
    B) There are only about 100 different kinds of atoms that combine to form all substances.
    C) There are thousands of different kinds of atoms that account for a wide variety of substances.
    D) A large atom can be photographed with the aid of an ordinary microscope.
    E) None of these statements are true.


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