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Topic 12 : Nuclear Chemistry
1. Nuclear Decays and transmutations: Recalling concept facts and definitions
1. Atoms of one element are converted to atoms of another element through the process of
3) Transmutation
1) Combustion
2) Oxidation 4) Polymerization
2. Which process converts an atom from one element to another when the nucleus of an atom is
bombarded with high-energy particles?
1) Artificial transmutation 3)) Natural transmutation
4) Condensation polymerization
2) Addition polymerization
3. Spontaneous decay of elements with atomic number of 83 and above is through the process of
3) Naturalization reactions
1) Artificial transmutation
2) Natural transmutation 4) Oxidation-reduction reaction
4. Spontaneous decay of certain elements in nature occurs because these elements have
Teacher Preview Copy
Teacher Preview Copy
` 1) Disproportionate ratio of electrons to protons 3) High reactivity with oxygen
2) Disproportionate ratio of neutrons to protons
4) Low reactivity with oxygen
5. Unstable atoms generally have 3) More neutrons than protons
1) More electrons than protons
2) More protons than electrons 4) More protons than neutrons
6. A beta or an alpha particle may be spontaneously emitted from
1) A ground-state atom 3) An excited electron
4) An unstable nucleus
2) A stable nucleus
7. The energy released by a nuclear reaction results primarily from
3) Conversion of mass into energy
1) Breaking of bonds between atoms
2) Formation of bonds between atoms 4) Conversions of energy into mass
8. A carbon-14 atom spontaneously decayed to form a nitrogen-14 atom. This change took place
because
1) A transmutation occurred without particle emission 3) Nitrogen-14 has an unstable nucleus
2) A transmutation occurred with particle emission
4) Carbon-14 has a stable nucleus
9. Elements with no stable isotope generally have
1) Atomic number of 82 or less 3) Atomic mass of 82 or less
2) Atomic number of 83 or more 4) Atomic mass of 83 or more
10. Bombarding a nucleus with high-energy particles that changes it from one element to another is called
1) A half-reaction 3) Natural transmutation
4) Artificial transmutation
2) A breeder reaction
2. Nuclear decay and transmutation: Determining elements with stable isotopes
1. Element of which atomic number has no stable isotopes?
1) 19 2) 1 3) 88 4) 18
2. Which of these elements has no known stable isotope?
1) Polonium 2) Gold 3) Xenon 4) Iron
3. Which Group 18 element is naturally radioactive and has no known stable isotope?
1) Ar 2) Rn 3) Xe 4) Kr
4. Element with which atomic number has stable isotopes?
1) 79 2) 84 3) 90 4) 92
Copyright©2010 E3 Scholastic Publishing. All Rights Reserved. SurvivingChem.com 339
Topic 12 : Nuclear Chemistry
1. Nuclear Decays and transmutations: Recalling concept facts and definitions
1. Atoms of one element are converted to atoms of another element through the process of
3) Transmutation
1) Combustion
2) Oxidation 4) Polymerization
2. Which process converts an atom from one element to another when the nucleus of an atom is
bombarded with high-energy particles?
1) Artificial transmutation 3)) Natural transmutation
4) Condensation polymerization
2) Addition polymerization
3. Spontaneous decay of elements with atomic number of 83 and above is through the process of
3) Naturalization reactions
1) Artificial transmutation
2) Natural transmutation 4) Oxidation-reduction reaction
4. Spontaneous decay of certain elements in nature occurs because these elements have
Teacher Preview Copy
Teacher Preview Copy
` 1) Disproportionate ratio of electrons to protons 3) High reactivity with oxygen
2) Disproportionate ratio of neutrons to protons
4) Low reactivity with oxygen
5. Unstable atoms generally have 3) More neutrons than protons
1) More electrons than protons
2) More protons than electrons 4) More protons than neutrons
6. A beta or an alpha particle may be spontaneously emitted from
1) A ground-state atom 3) An excited electron
4) An unstable nucleus
2) A stable nucleus
7. The energy released by a nuclear reaction results primarily from
3) Conversion of mass into energy
1) Breaking of bonds between atoms
2) Formation of bonds between atoms 4) Conversions of energy into mass
8. A carbon-14 atom spontaneously decayed to form a nitrogen-14 atom. This change took place
because
1) A transmutation occurred without particle emission 3) Nitrogen-14 has an unstable nucleus
2) A transmutation occurred with particle emission
4) Carbon-14 has a stable nucleus
9. Elements with no stable isotope generally have
1) Atomic number of 82 or less 3) Atomic mass of 82 or less
2) Atomic number of 83 or more 4) Atomic mass of 83 or more
10. Bombarding a nucleus with high-energy particles that changes it from one element to another is called
1) A half-reaction 3) Natural transmutation
4) Artificial transmutation
2) A breeder reaction
2. Nuclear decay and transmutation: Determining elements with stable isotopes
1. Element of which atomic number has no stable isotopes?
1) 19 2) 1 3) 88 4) 18
2. Which of these elements has no known stable isotope?
1) Polonium 2) Gold 3) Xenon 4) Iron
3. Which Group 18 element is naturally radioactive and has no known stable isotope?
1) Ar 2) Rn 3) Xe 4) Kr
4. Element with which atomic number has stable isotopes?
1) 79 2) 84 3) 90 4) 92
Copyright©2010 E3 Scholastic Publishing. All Rights Reserved. SurvivingChem.com 339
