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- 1. Multiple ChoiceWhich type of radiation has the greatest penetrating power?AlphaBetaGammaMicrowaves
- 2. Multiple ChoiceThe technetium-99 isotope has a half-life of 6.0 hours. If 100.0 mg were injected into a patient how much remains after 18 hours?33.0 mg12.5 mg.33 mg15.8 mg
- 3. Multiple ChoiceWhat happens to the atomic number during alpha decay?The atomic number decreases by 4The atomic number increases by 1The atomic number decreases by 2.The atomic number stays the same.
- 4. Multiple Choice
Arrange in order of increasing ability to penetrate matter.Beta, gamma, alphaAlpha, gamma, betaGamma, beta, alphaAlpha, beta, gamma - 5. Multiple ChoiceBalance the following equation:
146C --> 0-1e + ________145B146C147N42He - 6. Multiple Choice
In the symbol 167N what the 7 stand for?
Mass number
Atomic number
Atomic mass
Number of neutrons
- 7. Multiple ChoiceThe half life of Thorium-234 is 24 days. What fraction of the element remains after 96 days1/21/41/81/16
- 8. Multiple ChoiceComplete the nuclear equation and determine the type of decay that is occurring in this reaction.alphabetagammanone
- 9. Multiple ChoiceAlpha particles have a _____ charge.+20+1-1
- 10. Multiple ChoiceBarium-122 has a half-life of 2 minutes. A fresh sample weighing 80 g was obtained. If it takes 10 minutes to set up an experiment using barium-122, how much barium-122 will be left when the experiment begins?0.25g2.5g25g80g
- 11. Multiple ChoiceWhat does it mean when an element is radioactive?atom emits radiationnucei unstable due to uneven p to n rationuclei changes to become stableall of the above
- 12. Multiple ChoiceWhat is the missing isotope that will balance the following nuclear equation?
94Be + 11H → _____ + 42He105B105Ne63Li63C - 13. Multiple ChoiceThe time taken for half of an amount of radioactive atoms to decay.Nuclear fusionFull-lifeDead timeHalf-life
- 14. Multiple ChoiceWhat is NOT a characteristic of an alpha particle?A negatively charged electronStopped by paperA positively charged particleLow penetration
- 15. Multiple ChoiceIf Thorium-234 undergoes a beta decay, What element will be left in its place?Actinium-234Thorium-233Protactinium-234Radium-230
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