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- 1. Multiple ChoiceAfter 4 half-lives, 1g of a sample of Krypton-85 remains unchanged. What was the original mass of the sample?16g32g0.0625g4g
- 2. Multiple ChoiceThe half-life of strontium-90 is 25 years. How much strontium-90 will remain after 100 years if the initial amount is 4.0 g?3.0g0.25mg0.3g0.25g
- 3. Multiple ChoiceThe type of radioactive particle that can be stopped by a sheet of paper is the ____.alpha particlebeta particlegamma rayuranium
- 4. Multiple Choice
Finish this equation
20983Bi--> _______ + 20581Tl
42He
0-1e
y
- 5. Multiple Choice
Identify the missing substance in each of the following nuclear reaction.
_____→13756 Ba + 0−1 e
13755Ba
13757La
13856Ba
13755Cs
- 6. Multiple Choice
The three types of nuclear radiation in order of increasing penetrating power are ____.
alpha, beta, gamma
X ray, beta, gamma
alpha, gamma, beta
X ray, gamma, beta
- 7. Multiple ChoiceWhat is the symbol for an alpha particle?42He0-1e0+1 e10n
- 8. Multiple ChoiceTwo or more nuclei combine to form one larger nucleus in the process of nuclear _____.FusionFissionTracingDecay
- 9. Multiple Choice
This is an example of...Fission reactionFusion reactionDecomposition reactionDecay - 10. Multiple ChoiceThe splitting of a nucleus into smaller nuclei isfusionfissiondecaygamma radiation
- 11. Multiple ChoiceHow many neutrons does the isotope of lithium-8 have?8345
- 12. Multiple ChoiceHow many neutrons does uranium-235 have?23892146143
- 13. Multiple ChoiceBeta particles have a _____ charge+10-1+2
- 14. Multiple ChoiceWhich type of nuclear radiation is being emitted here?AlphaBetaGammanone
- 15. Multiple ChoiceIf Thorium-234 undergoes a beta decay, What element will be left in its place?Actinium-234Thorium-233Protactinium-234Radium-230
- 16. Multiple Choice
Finish the following alpha decay reaction:
- 17. Multiple Choice
What is an isotope?
forms of the same element that contain equal numbers of electrons but different numbers of protons
forms of the same element
forms of the same element that contain equal numbers of protons but different numbers of neutrons
An atom with no nucleus
- 18. Multiple Choice
Fission and fusion are similar because both
combine lighter nuclei in to one heavier nucleus
split a large nucleus into two smaller nuclei
convert mass into energy
convert energy into mass
- 19. Multiple Choice
Determine the time required for a sample of radon-222 to decay until only 1/8 of the original sample remains unchanged
3.823 d
7.646 d
11.469 d
15.292
- 20. Multiple Choice
In which reaction is an atom of one element converted into an atom of another element?
combustion
fermentation
oxidation-reduction
transmutation
- 21. Multiple Choice
What is the half-life of a radioactive element if an 80 gram sample decayed to 40 grams in 12 hrs?
12 h
6 h
24 h
36 h
- 22. Multiple Choice
Complete the nuclear equation for the decay of Cobalt-60:
6026Co
6026Fe
6025Mn
6028Ni
- 23. Multiple Choice
Which nuclear equation represents spontaneous decay?
(1)
(2)
(3)
(4)
- 24. Multiple Choice
The radio of the mass of U-238 to the mass of Pb-206 can be used to
diagnose thyroid disorders
diagnose kidney functions
date geological formations
date once-living things
- 25. Multiple Choice
Using equal masses of reactants, which statement describes the relative amounts of energy released during a chemical reaction and a nuclear reaction?
The chemical and nuclear reactions release equal amounts of energy.
The nuclear reaction releases half the amount of energy of the chemical reaction.
The chemical reaction releases more energy than the nuclear reaction.
The nuclear reaction releases more energy than the chemical reaction.
- 26. Multiple Choice
What fraction of an original K-42 sample remains unchanged after 24.72 hours?
1/2
1/4
1/8
1/16
- 27. Multiple Choice
Which nuclear emission has the least penetrating power and the greatest ionizing ability?
alpha particle
beta particle
gamma ray
positron
- 28. Multiple Choice
Which type of nuclear reaction is represented by the equation?
fission
fusion
beta decay
alpha decay
- 29. Multiple Choice
Which phrase describes a risk of using the radioisotope Co-60 in treating cancer?
production of acid rain
production of greenhouse gases
increased biological exposure
increased ozone depletion
- 30. Multiple Choice
Determine the time required for a 16.00-gram sample of I-131 to decay until only 1.00 gram of the sample remains unchanged.
8.021 d
16.042 d
24.063d
32.048 d
- 31. Multiple Choice
Which nuclear emission is listed with its notation?
(1)
(2)
(3)
(4)
- 32. Multiple Choice
What evidence indicates that the nuclei of strontium-90 atoms are unstable?
Strontium-90 electrons are in the excited state.
Strontium-90 electrons are in the ground state.
Strontium-90 atoms spontaneously absorb beta particles
Strontium-90 atoms spontaneously emit beta particles
- 33. Multiple Choice
The energy released during a nuclear reaction is a result of
breaking chemical bonds
forming chemical bonds
mass being converted to energy
energy being converted to mass
- 34. Multiple Choice
Which radioisotope is used to determine the age of once-living organisms?
carbon-14
cobalt-60
iodine-131
uranium-238
- 35. Multiple Choice
Choose the correct missing particle that correctly completes the nuclear equation shown in the picture.
(1)
(2)
(3)
(4)
- 36. Multiple Choice
What is the mass of an original 5.60-gram sample of iron-53 that remains unchanged after 25.53 minutes?
0.35 g
0.70 g
1.40 g
2.80 g
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