Half-Life
Nuclear Equations
Fusion & Fission
Decay
Wild Card
100
At time 0, you have 400g of francium-220. How many grams of francium-220 will remain after 82.2 s?
50
100
Which term identifies a type of nuclear reaction? 1. fermentation 2. deposition 3. reduction 4. fission
4. fission
100
The greatest amount of energy released per gram of reactants occurs during a 1. redox reaction 2. substitution reaction 3. fission reaction 4. neutralization reaction
3. fission reaction
100
Radiation is spontaneously emitted from hydrogen-3 nuclei, but radiation is not spontaneously emitted from hydrogen-1 nuclei or hydrogen-2 nuclei. Which hydrogen nuclei are stable? 1. nuclei of H-1 and H-2, only 2. nuclei of H-2 and H-3, only 3. nuclei of H-1 and H-3, only 4. nuclei of H-1, H-2, and H-3
1. nuclei of H-1 and H-2, only
100
When a radioactive nucleus emits a beta particle, the atom's (1) mass number is increased by 1 (2) mass number is decreased by 1 (3) atomic number is increased by 1 (4) atomic number is decreased by 1
(3) atomic number is increased by 1
200
In 6.2 h, a 100 g sample of Ag-112 decays to 25 g. What is the half-life of Ag-112? (1) 1.60 h (2) 3.10 h (3) 6.20 h (4) 12.4 h
(2) 3.10 h
200
Slide 9 Nuclear Equation 200
Alpha decay
200
During a nuclear reaction, mass is converted into 1. charge 2. energy 3. isomers 4. volume
2. energy
200
One beneficial use of radioisotopes is 1. detection of disease 2. decreasing the dissolved O2(g) level in seawater 3. neutralization of an acid spill 4. increasing the concentration of CO2(g) in the atmosphere
1. detection of disease
200
How many grams of a 20g sample of C-14 would remain after 17,190 years?
5g
300
1/16, 1/8, 1/4, 1/2, 1/1 48h/4= 12h 3. 12 h
After decaying for 48 hours, 1/16 of the original mass of a radioisotope sample remains unchanged. What is the half-life of this radioisotope? 1. 3.0 h 2. 9.6 h 3. 12 h 4. 24 h
300
Slide 6 Nuclear Equation 300
Mass Number decreases by 4 and atomic number decreases by 2
300
When a Uranium nucleus breaks up into fragments, which type of nuclear reaction occurs? (1) fusion (2) fission (3) replacement (4) redox
(2) fission
300
Which statement describes the stability of the nuclei of potassium atoms? 1. All potassium atoms have stable nuclei that spontaneously decay. 2. Some potassium atoms have unstable nuclei that spontaneously decay. 3. All potassium atoms have unstable nuclei that do not spontaneously decay. 4. Some potassium atoms have unstable nuclei that do not spontaneously decay.
2. Some potassium atoms have unstable nuclei that spontaneously decay.
300
As the temperature increases, pressure remaining constant, the half-life of radioactive element (1) decreases (2) increases (3) remains the same (4) depends on the mass
(3) remains the same
400
Which radioisotopes have the same decay mode and have half-lives greater than 1 hour? 1. Au-198 and N-16 2. I-131 and P-32 3. Ca-37 and Fe-53 4. Tc-99 and U-233
2. I-131 and P-32
400
Slide 4
slide 4 Mass Number stays the same, # protons increase by 1
400
Slide 10 Fusion & Fission 400
(1)
400
Compared to the mass and the penetrating power of an alpha particle, a beta particle has 1. less mass and greater penetrating power 2. more mass and greater penetrating power 3. less mass and less penetrating power 4. more mass and less penetrating power
1. less mass and greater penetrating power
400
Slide An original sample of K-40 has a mass of 25.00 grams. After 3.9 × 109years, 3.125 grams of the original sample remains unchanged. What is the half-life of K-40? (1) 1.3 × 109 y (3) 3.9 × 109 y (2) 2.6 × 109 y (4) 1.2 × 1010 y
(1)
500
Illuminated EXIT signs are used in public buildings such as schools. If the word EXIT is green, the sign may contain the radioisotope tritium, hydrogen-3. The tritium is a gas sealed in glass tubes. The emissions from the decay of the tritium gas cause a coating on the inside of the tubes to glow. Determine the fraction of an original sample of tritium that remains unchanged after 24.62 years. [1]
1/4
500
Slide 7 Nuclear Chemistry 500
Beta Decay, Mass number stays the same, atomic number increases
500
Slide 8 Fusion & Fission 500 Nuclear fission has been used to produce electricity. However, nuclear fusion for electricity production is still under development. The notations of some nuclides used in nuclear reactions are shown in the accompanying table.
Nuclear fission has been used to produce electricity. However, nuclear fusion for electricity production is still under development. The notations of some nuclides used in nuclear reactions are shown in the accompanying table.
500
Slide 11 Decay 500
(2)
500
Slide 12 Wild Card 500
3 neutrons
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