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5 Written questions

5 Matching questions

  1. the whole world
  2. still not be able to see or photograph an atom
  3. Molecules are the smallest subdivision of matter that still retains chemical properties of a substance
  4. all of these
  5. air
  1. a 20) The air in this room has
    A) mass.
    B) weight.
    C) energy.
    D) all of these
    E) none of these
  2. b 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. c 8) Which of these statements is true?
    A) A molecule is the smallest particle that exists.
    B) Chemical elements are made up of about 100 distinct molecules.
    C) Molecules form atoms that in turn determine chemical properties of a substance.
    D) Molecules are the smallest subdivision of matter that still retains chemical properties of a substance.
    E) None of these statements is true.
  4. d 12) Which of the following is not a compound?
    A) air
    B) ammonia
    C) water
    D) salt
    E) All are compounds.
  5. e 6) If we doubled the magnifying power of the most powerful optical microscope in the world, we would
    A) be able to see individual atoms.
    B) be able to photograph individual atoms, even though we couldn't see them.
    C) still not be able to see or photograph an atom.

5 Multiple choice questions

  1. 44) Which of these atoms has the greatest number of electrons?
    A) helium
    B) carbon
    C) iron
    D) gold
    E) uranium
  2. 23) 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.
  3. 9) 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.
  4. 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.
  5. 41) If one neutron is added to a helium nucleus, the result is
    A) hydrogen.
    B) boron.
    C) lithium.
    D) beryllium.
    E) helium.

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. two1) How many different elements are in a water molecule?
    A) one
    B) two
    C) three
    D) four
    E) none

          

  3. 16 times as great27) 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.

          

  4. None. All of the above choices are mixtures.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. anti-hydrogen34) A positron orbiting an antiproton would make up an atom of
    A) positronium.
    B) unobtainium.
    C) anti-helium.
    D) anti-hydrogen.
    E) none of these