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5 Written questions

5 Matching questions

  1. 18 amu
  2. fluorine
  3. the whole world
  4. all of these
  5. protons
  1. a 16) A molecule has
    A) mass.
    B) structure.
    C) energy.
    D) all of these
    E) none of these
  2. b 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.
  3. c 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
  4. d 29) The weight of matter comes mostly from its
    A) protons.
    B) electrons.
    C) neutrons
  5. e 39) If two protons are added to an oxygen nucleus, the result is
    A) heavy oxygen.
    B) fluorine.
    C) neon.
    D) sodium.
    E) nitrogen.

5 Multiple choice questions

  1. 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. 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
  3. 12) Which of the following is not a compound?
    A) air
    B) ammonia
    C) water
    D) salt
    E) All are compounds.
  4. 25) Assuming all the atoms exhaled by Julius Caesar in his last dying breath are still in the atmosphere, then we probably breathe one of those atoms with each
    A) single breath.
    B) day.
    C) month.
    D) ten years.
    E) It depends - some people still breathe a few of Caesar's atoms every day, while others wouldn't breathe one for an entire year.
  5. 26) 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

5 True/False questions

  1. neutron30) The volume of matter comes mostly from its
    A) protons.
    B) electrons.
    C) neutrons

          

  2. 999 grams35) 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.

          

  3. electrons2) Which of the following are electrically neutral?
    A) proton
    B) neutron
    C) electron
    D) ion
    E) none of these

          

  4. 16 times as great32) 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. a quark12) Which of the following is not a compound?
    A) air
    B) ammonia
    C) water
    D) salt
    E) All are compounds.

          

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