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5 Written questions

5 Matching questions

  1. the same
  2. neutron
  3. the same age
  4. short-lived
  5. uranium
  1. a 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.
  2. b 2) Which of the following are electrically neutral?
    A) proton
    B) neutron
    C) electron
    D) ion
    E) none of these
  3. c 24) In our part of the universe, antimatter is
    A) non-existent.
    B) plentiful.
    C) short-lived.
    D) long-lived.
  4. d 43) Which of these atoms has the greatest amount of electrical charge in its nucleus?
    A) helium
    B) carbon
    C) iron
    D) gold
    E) uranium
  5. e 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.

5 Multiple choice questions

  1. 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. 10) What makes an element distinct?
    A) the number of protons
    B) the number of neutrons
    C) the number of electrons
    D) the total mass of all the particles
    E) none of these
  3. 22) When carbon and oxygen atoms combine, energy is
    A) taken in by the reaction.
    B) given off by the reaction.
    C) not involved.
  4. 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. 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.

5 True/False questions

  1. 18 amu36) 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.

          

  2. uranium7) Which of these atoms has the most mass?
    A) hydrogen
    B) iron
    C) lead
    D) uranium
    E) All have the same mass.

          

  3. both the same21) 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.

          

  4. There are only about 100 different kinds of atoms that combine to form all substances23) If an astronaut landed on a planet made of antimatter, there would be an explosion and
    A) the planet would annihilate.
    B) an amount of planet matter equal to that of the astronaut would annihilate.
    C) the astronaut would annihilate.
    D) the astronaut and an equal amount of the planet would both annihilate.

          

  5. two42) 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.