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5 Written questions

5 Matching questions

  1. a quark
  2. orbital electrons
  3. a carbon atom
  4. air
  5. the number of protons
  1. a 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
  2. b 12) Which of the following is not a compound?
    A) air
    B) ammonia
    C) water
    D) salt
    E) All are compounds.
  3. c 15) The smallest particle of those listed below is
    A) a molecule.
    B) an atom.
    C) a proton.
    D) a neutron.
    E) a quark.
  4. d 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. e 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.

5 Multiple choice questions

  1. 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.
  2. 31) The chemical properties of matter come mostly from its
    A) protons.
    B) electrons.
    C) neutrons.
  3. 19) Which has the greatest number of protons in its nucleus?
    A) gold.
    B) mercury.
    C) lead.
    D) silver.
  4. 1) How many different elements are in a water molecule?
    A) one
    B) two
    C) three
    D) four
    E) none
  5. 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

5 True/False questions

  1. thermonuclear fusion10) 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

          

  2. the same age27) 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. uranium7) Which of these atoms has the most mass?
    A) hydrogen
    B) iron
    C) lead
    D) uranium
    E) All have the same mass.

          

  4. ancient stars21) 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. 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.

          

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