Download Name Class Date assigned Due date Nuclear chemistry ws – part 1

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Date assigned
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Nuclear chemistry ws – part 1
Adapted from http://www.chemcool.com/regents/nuclearchemistry/aim4.htm
1) Given the diagram representing a reaction:
Which phrase best describes this type of reaction and the overall energy change that occurs?
a) nuclear, and energy is released
b) nuclear, and energy is absorbed
c) chemical, and energy is released
d) chemical, and energy is absorbed
2) Which balanced equation represents nuclear fusion?
3) The energy released by a nuclear reaction results primarily from the
a) breaking of bonds between atoms
b) formation of bonds between atoms
c) conversion of mass into energy
d) conversion of energy into mass
4) A nuclear fission reaction and a nuclear fusion reaction are similar because both reactions
a) form heavy nuclides from light nuclides
b) form light nuclides from heavy nuclides
c) release a large amount of energy
d) absorb a large amount of energy
5) The amount of energy released from a fission reaction is much greater than the energy released from a
chemical reaction because in a fission reaction
a) mass is converted into energy
b) energy is converted into mass
c) ionic bonds are broken
d) covalent bonds are broken
6) Which change takes place in a nuclear fusion reaction?
a) Matter is converted to energy
b) Energy is converted to matter
c) Ionic bonds are converted to covalent bonds
d) Covalent bonds are converted to ionic bonds.
7) Which equation represents a fusion reaction?
1. H2O(g)  H2O(l)
2. C(s) + O2(g)  CO2(g)
+ 31H  42He + 10n
3.
2
4.
235
92U
1H
+ 10n  14256Ba + 9136Kr + 310n
8) Nuclear fusion differs from nuclear fission because nuclear fusion reactions
a) form heavier isotopes from lighter isotopes
b) form lighter isotopes from heavier isotopes
c) convert mass to energy
d) convert energy to mass
9) Given the fusion reaction:
2
1H
+ 21H  X + energy
Which particle is represented by X?
1.
1
1H
3. 32He
2.
3
1H
4. 42He
Use the following to answer 14-18:
242
94Pu
(an electrically neutral atom before any radioactive decay)
10. Identify the atomic mass.
11. Identify the atomic number.
12. Identify the number of protons.
13. Identify the number of neutrons.
14. Identify the number of electrons.
15. For the isotope Plutonium 245, is 245 the atomic mass or the atomic number?
16. Nuclear radiation occurs in which part of an atom: nucleus or electrons?
17. Nuclear radiation changes the identity of an atom. T or F
18. Which type of reaction happens in stars?
Name
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Nuclear chemistry ws – part 2
Adapted from http://www.chemcool.com/regents/nuclearchemistry/aim4.htm
19. An alpha particle has ____ protons and ____neutrons. So its atomic mass is ____ and it’s charge is
____.
20. 22494Pu undergoes Alpha radiation to become Uranium. Write the nuclear equation for this reaction.
21. In negative Beta radiation, a neutron splits into an _______________ and a _______________.
22. In negative Beta radiation, the actual Beta particle is an _________________.
23. Does Gamma radiation emit a particle or energy only?
24. In positive Beta radiation, a proton splits into a __________________ and a ___________________.
25. In positive Beta radiation, the actual Beta particle is a _________________.
26. List at least three ways humans use radioactivity and nuclear decay. (research this answer)
27. 7) Which equation represents positron decay?
1. 8737Rb  0-1e + 8738Sr
2.
227
92U
 22390Th + 42He
3.
27
13Al
+ 42He  3015P + 10n
4.
11
6C
 0-1e + 115B