physical science chapter 9 review. ch 9 review 1. which particles make up the nucleus of the atom?...
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Physical ScienceChapter 9 Review
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1. Which particles make up the nucleus of the atom?
a. electronsb. neutrons
c. protonsd. photons
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1. Which particles make up the nucleus of the atom?
a. electronsb. neutrons
c. protonsd. photons
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2. What is the term for high energy radiation particles form the nucleus of a radio active atom?
a.Atomic energyb.Chemical changec.Physical changed.radioactivity
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2. What is the term for high energy radiation particles form the nucleus of a radio active atom?
a.Atomic energyb.Chemical changec.Physical changed.radioactivity
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3. Who first discovered radioactivity??
a.Isaac Newtonb.Henri Becquerelc.Mari Curied.Hans Geiger
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3. Who first discovered radioactivity?
a.Isaac Newtonb.Henri Becquerelc.Mari Curied.Hans Geiger
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4. Which of the following elements is most likely to be radioactive?
a.Arsenic-75b.Antimony-122c.Lead-82d.Polomium-209
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4. Which of the following elements is most likely to be radioactive?
a.Arsenic-75b.Antimony-122c.Lead-82d.Polomium-209
Remember elements with an atomic number greater than 82 are radioactive.Po atomic # is 84, look on the periodic table.
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5. What does the number 209 mean in the term Po-209?
a.Atomic number is 209b.Mass is 209c.There are 209 neutronsd.There are 209 protons
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5. What does the number 209 mean in the term Po-209?
a.Atomic number is 209b.Mass is 209c.There are 209 neutronsd.There are 209 protons
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6. The atomic mass is the sum of what two particles?
a.Electrons and protonsb.Electrons and neutronsc.Neutrons and protons d.Electrons, protons and neutrons
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6. The atomic mass is the sum of what two particles?
a.Electrons and protonsb.Electrons and neutronsc.Neutrons and protons d.Electrons, protons and neutrons
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7. What is the atomic mass of the following nuclide?
a.90b.142c.232d.322
90232 Th
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7. What is the atomic mass of the following nuclide?
a.90b.142c.232d.322
90232 Th
Mass is the top number
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7. What is the atomic mass of the following nuclide?
a.90b.142c.232d.322
90232 Th
Mass is the top number
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8. Which indicates the number of protons in an element?
a.Atomic massb.Atomic numberc.Neutrino numberd.Valence electronse.322
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8. Which indicates the number of protons in an element?
a.Atomic massb.Atomic numberc.Neutrino numberd.Valence electronse.322
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9. What force keeps the like charge of the positive protons in the nucleus from flying apart from each other?a.Gravityb.Magnetismc.Strong forced.Weak forcee.322
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9. What force keeps the like charge of the positive protons in the nucleus from flying apart from each other?a.Gravityb.Magnetismc.Strong forced.Weak forcee.322
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10. How many neutrons does this isotope have?a.90b.142c.232d.322 90
232 Th
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10. How many neutrons does this isotope have?a.90b.142c.232d.322 90
232 ThMass numberAtomic number
142
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11. What is the nuclide notation for Plutonium-246?
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11. What is the nuclide notation for Plutonium-246?a.90b.*232c.322 94
246 PuMass numberAtomic number
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12. What term describes the nucleus of an isotope with a specific atomic mass?
a.Gamma rayb.Ionc.Nuclided.positron
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12. What term describes the nucleus of an isotope with a specific atomic mass?
a.Gamma rayb.Ionc.Nuclided.positron
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13. What is the element describes by the element at the left?
a.Phosphorusb.Germaniumc.Silverd.uranium
1532 ?
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13. What is the element describes by the element at the left?
a.Phosphorusb.Germaniumc.Silverd.uraniume.positron
1532 PAtomic number 15
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14. What is the term for radiation in the form of a helium nucleus?
a.Alpha particleb.Beta particlec.Gamma rayd.Hercules particle
24He
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14. What is the term for radiation in the form of a helium nucleus?
a.Alpha particleb.Beta particlec.Gamma rayd.Hercules particle
24He
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15. What is the charge on an alpha particle?
a.positiveb.negativec.neutral
24He
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15. What is the charge on an alpha particle?
a.positiveb.negativec.neutral
24He
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16. The process of one element changing into another element through the process of nuclear decay is called ________.
a.ionizationb.modulationc.transformationd.transmutation
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16. The process of one element changing into another element through the process of nuclear decay is called ________.
a.ionizationb.modulationc.transformationd.transmutation
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17. The process of one element changing into another element through the process of nuclear decay is called ________.
a.ionizationb.modulationc.transformationd.transmutation
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Pu218
84 ??
?He +42
18. If polonium undergoes alpha decay what product do you expect?
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Pu218
84 ?214
82He +42
17. If polonium undergoes alpha decay what product do you expect?
look up atomic number
Pb
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19. Which type of radiation has the highest energy?
a.alpha particlesb.beta particlesc.gamma raysd.neutron emission
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19. Which type of radiation has the highest energy?
a.alpha particlesb.beta particlesc.gamma raysd.neutron emission
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20 What does the following symbol represent?
a.alpha particlesb.beta particlesc.gamma raysd.neutron emission
-10e
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20 What does the following symbol represent?
a.alpha particlesb.beta particlesc.gamma raysd.neutron emission
-10e
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21. Which type of radiation in the cloud chamber produced the thin, fast moving trails?
a.alpha particlesb.beta particlesc.gamma raysd.neutron emission
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21. Which type of radiation in the cloud chamber produced the thin, fast moving trails?
a.alpha particlesb.beta particlesc.gamma raysd.neutron emission
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22. The time it takes for half of a given amount of radioactive material to decay is called ____?
a.decay lifeb.half lifec.half timed.disintegration ratio
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22. The time it takes for half of a given amount of radioactive material to decay is called ____?
a.decay lifeb.half lifec.half timed.disintegration ratio
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23. What charge does a gamma ray have?
a.positive b.negativec.neutral
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23. What charge does a gamma ray have?
a.positive b.negativec.neutral
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24. Carbon-14 has a half-life of 5730 years. Which of the following can we accurately determine the age using carbon-14?
a.time of death within one weekb.age of dinosaur bonesc.age of first rocks formed on earthd.age of first century art work
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24. Carbon-14 has a half-life of 5730 years. Which of the following can we accurately determine the age using carbon-14?
a.time of death within one weekb.age of dinosaur bonesc.age of first rocks formed on earthd.age of first century art work
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24. Carbon-14 has a half-life of 5730 years. Which of the following can we accurately determine the age using carbon-14?
a.time of death within one weekb.age of dinosaur bonesc.age of first rocks formed on earthd.age of first century art work
too short of time, not enough decay will have occurred
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24. Carbon-14 has a half-life of 5730 years. Which of the following can we accurately determine the age using carbon-14?
a.time of death within one weekb.age of dinosaur bonesc.age of first rocks formed on earthd.age of first century art work
millions of years – too much material has decayed
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24. Carbon-14 has a half-life of 5730 years. Which of the following can we accurately determine the age using carbon-14?
a.time of death within one weekb.age of dinosaur bonesc.age of first rocks formed on earthd.age of first century art work
billions of years – none left and rocks don’t absorb carbon
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25. The diagram below depicts what type of reaction?
a.alpha decayb.neutron emissionc.nuclear fission chain reactiond.nuclear fusion chain reaction
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25. The diagram below depicts what type of reaction?
a.alpha decayb.neutron emissionc.nuclear fission chain reactiond.nuclear fusion chain reaction
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26. What particle must be released for a nuclear chain reaction to be sustained??a.electronb.protonc.neutrond.gamma raye.beta particle
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26. What particle must be released for a nuclear chain reaction to be sustained?a.electronb.protonc.neutrond.gamma raye.beta particle
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27. When small nuclei are fused together to form a larger nucleus the process is called _______.a.fissionb.fusionc.nucleationd.transmutation
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27. When small nuclei are fused together to form a larger nucleus the process is called _______.a.fissionb.fusionc.nucleationd.transmutation
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28. Which process release more energy?a. nuclear fusionb. nuclear fissionc. gamma radiation
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28. Which process release more energy?a. nuclear fusionb. nuclear fissionc. gamma radiation
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29. Energy form nuclear fission is currently utilized in all of the following EXCEPT
a. generate electricityb. power source in submarinesc. power source in space probesd. weaponse. source of energy from the sunf. nuclear fissiong. gamma radiation
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29. Energy form nuclear fission is currently utilized in all of the following EXCEPT
a. generate electricityb. power source in submarinesc. power source in space probesd. weaponse. source of energy from the sun
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30. A material has a half life of 4 weeks. How much of the original sample will remain after one year?
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30. A material has a half life of 4 months. How much of the original sample will remain after one year?•First determine how many half lives have passed. 1 year = 12 months•12 months/4 months = 3 half lives•Plug this number into the half-life equation
•amt remaining = original amt(1/2)n •where n=# of half-lives passed•% remaining = 100%(0.5)3•=100% x 0.125 or 12.5%
or you could write as 1/8 original sample.
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But what would happen if an atom actually lost protons?
P3013 ?
Note the change in atomic number.So the identity of the element will change!!!!
Al3013
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This is radioactivity!Radioactivity - the process by which an unstable nucleus emits one or more particles or energy in the form of electromagneticradiation.
- there are different types of radiation- this is only one example.
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Page
4 Types Nuclear
Radiation
You won’t need to memorize these values but you will need to know relative size.
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review writing nuclear decay reactions – here are the demonstrations again.
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Writing equations for Alpha DecayStep 1: Write the nuclide notation for your starting material,Step 2: Write the nuclide notation for the particle released.
Pu240
94 He 42
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Writing equations for Alpha DecayStep 1: Write the nuclide notation for your starting material,Step 2: Write the nuclide notation for the particle released.
Pu240
94 He 42
Step 3: Subtract the atomic mass units lost. 240 – 4 = 236
+236
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Writing equations for Alpha DecayStep 1: Write the nuclide notation for your starting material,Step 2: Write the nuclide notation for the particle released.
Pu240
94 He 42
Step 3: Subtract the atomic mass units lost. 240 – 4 = 236 Step 4: Subtract the protons lost. 94 – 2 = 92
+23692
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Writing equations for Alpha DecayStep 1: Write the nuclide notation for your starting material,Step 2: Write the nuclide notation for the particle released.
Pu240
94 He 42
Step 3: Subtract the atomic mass units lost. 240 – 4 = 236 Step 4: Subtract the protons lost. 94 – 2 = 92Step 5: Look up the new identity of the element and write the symbol.
+23692 U
Atomic number
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Anti-nutrino
II. Beta decay1. A neutron turns into a proton and emits an electron!
e-This electron is called a Beta particle
Symbol -
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Anti-nutrino
II. Beta decay1. A neutron turns into a proton and emits an electron!
e-This electron is called a Beta particle
Symbol -
You could draw a picture of the change that looked like this.
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7. Overall gain of one proton so transmutation has occurred. Example:
C14
6 e 0
-1 +14
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7. Overall gain of one proton so transmutation has occurred. Example:
C14
6 e 0
-1 +147 N
Remember you are subtracting so 6 – (-1) = 6 + 1 = 7
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III. Gamma Rays8. Transmutation does not occur by gamma emission.
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IV. Neutron emission8. Transmutation does NOT occur . . . but change in
mass number does due to loss of neutron.