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The Nucleus of the Atom Quiz #1
Contributed by: Collins
  • 1. The text's authors use the term "incredible emptiness" to explain:
A) The vast distance between atoms in the vacuum of outer space.
B) The vast distance between the nucleus of an atom and its orbiting electrons.
C) none of the answers are correct.
D) The vast distance between the neutrons and protons of the nucleus of an atom.
  • 2. Albert Einstein's equation E=mc2 tells us that:
A) mass can move faster than the speed of light.
B) mass does not determine the energy in most matter.
C) a lot of mass contains only a little energy.
D) a very small mass is equal to a very large amount of energy.
  • 3. In the chemical equation 2H2 + O2 -->2H2O the mass of the H2O molecule is slightly less than the masses of the H2 and O2 because:
A) ions are formed.
B) some of the mass is converted to the binding energy of the bond.
C) not all of the atoms are used.
D) the molecules of water lose neutrons.
  • 4. Which of these best explains the relationship of a proton and a neutron.
A) Neutrons are negative with smaller mass; protons are positive and much larger.
B) Neutrons are negative with much larger mass; protons are positive with a smaller mass.
C) Protons are positive, neutrons have no charge, and their masses are almost the same.
D) Protons are negative, neutrons are positive, and their mass is almost the same.
  • 5. Which of these statements best describes the relationship between parts of an atom and the atom's size and mass.
A) None of the answers are correct.
B) The nucleus gives the atom its size and electrons give the atom its mass.
C) The nucleus gives the atom its mass but electrons give the atom its size.
D) Protons, neutrons and electrons all contribute to both the size of an atom and an atom's mass.
  • 6. An element can be named if you know this:
A) None of the answers are correct.
B) Atomic number.
C) Number of electrons.
D) Mass number.
  • 7. What determines the atomic number of an atom?
A) The number of electrons in orbit around the nucleus.
B) The number of electrons plus the number of protons, divided by 2.
C) The number of protons in its nucleus.
D) The number of neutrons in its nucleus.
  • 8. Two atoms are said to be Isotopes of each other if:
A) They have the same atomic number but different atomic masses.
B) They have the same number of protons and neutrons but different atomic masses.
C) They have the same atomic mass but different atomic numbers.
D) They have the same number of electrons but different number of protons.
  • 9. The mass number of an atom is approximately:
A) The number of neutrons plus the number of electron in the atom.
B) The number of neutrons and protons, minus the number of electrons in an atom.
C) The number of protons in an atom multiplied by 2.
D) None of the answers are correct.
  • 10. Carbon's atomic number is 6. Determine how many neutrons Carbon-14 has.
A) 2
B) 8
C) 22
D) 6
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