Review Guide for Unit Test 2
Nuclear Chemistry
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What does the number 36 in the isotope, , represent?
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Atomic mass
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Mass number
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Number of protons
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Atomic number
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Both C and D
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What does the number 17 represent in the isotope ?
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Atomic mass
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Mass number
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Number of protons
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Atomic number
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Both C and D
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What does the number 222 represent in Radium-222?
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Atomic mass
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Mass number
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Number of protons
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Atomic number
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Both C and D
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What is the nuclear strong force?
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How do isotopes overcome this force?
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How would you describe isotopes when they have overcome this force (2 sentences)? Hint: you will need 3 key vocab terms in this description.
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What happens (what is the consequence) when isotopes overcome the nuclear strong force?
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They fall apart
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They start to lose energy
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They start to decay
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Nothing happens
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Both B and C are correct
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What is radiation and what type of isotopes emit it?
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What is a half-life? How is it measured (what 3 different units can be used)?
Half-Life Problems: Table Method – fill out the table for #10-11 and choose the appropriate answer choice.
Time
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Half-life
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Amount remaining
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0
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0
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If 30 grams of Fluorine-18 has a half-life of 110 minutes, how much will be left after 440 minutes?
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1.875g
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3.75g
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30g
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0.94g
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After 261 days, there are 4 protons of Sulfur-35 remaining. If the half-life of Sulfur-35 is 87 days, how much did you start with?
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16 protons
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8 protons
Time
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Half-life
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Amount remaining
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0
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0
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32 protons
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64 protons
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What is a daughter element?
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The energy or particle emitted from alpha, beta, or gamma radiation.
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The element created as a result of the parent element decaying.
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The element created from the alpha particle, beta particle or gamma radiation.
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The combination of the element created and the energy or particle emitted.
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Describe alpha decay:
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What is the alpha particle released and how many protons and neutrons does it have?
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What is the mass of the alpha particles?
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How do you determine the daughter element produced (how many protons are added or subtracted and how does the mass change)?
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Fill in the missing information in the following alpha decay reaction:
__________ + __________
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+ +
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+ +
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Fill in the missing information for the following alpha decay reaction:
Mendelevium-250 __________ + __________
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Einsteinium-246 + Helium-2
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Einsteinium-246 + Helium-4
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Fermium-246 + Helium-4
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Mendelevium-250 + Helium-2
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Describe beta decay:
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What is the beta particle released?
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What is its mass and proton number of the particle emitted?
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How do you determine the daughter element produced (how many protons are added or subtracted and how does the mass change)?
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Fill in the missing information for the following beta decay reaction:
__________ + __________
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+ C. +
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+ D. +
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Fill in the missing information for the following beta decay reaction:
Promethium-165 _____________ + ____________
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Promethium-165 + electron-0
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Samarium-165 + electron-0
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Samarium-166 + electron 1
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Neodymium-165 + electron-0
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Describe gamma decay:
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What is emitted in gamma decay?
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What is the mass number and proton number?
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How do you determine the daughter element produced?
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Fill in the missing information for the following gamma decay reaction:
__________ + __________
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+ energy C. + energy
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+ energy D. + electrons
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Fill in the missing information for the following gamma decay reaction:
Astatine-198 ____________ + _____________
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Astatine-199 + energy C. Polonium-198 + energy
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Astatine-198 + electrons D. Polonium-199 + electrons
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Use the reaction diagram below to answer A.
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Describe the process of fission using the reaction and elements above.
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Use the reaction diagram below to answer A.
Step 1 Step 2 Step 3 Step 4
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Describe the process of fusion using the reaction and elements above (remember, = hydrogen, = deuterium, = tritium).
**Step 2 element = **Step 3 element =
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Choose a topic from the presentations and describe the efficiency of that process as the students did when presenting.
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Choose a topic from the presentations and describe how the process works (i.e. fission/fusion bomb, sun, reactor etc) as the students did when presenting.
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