Review Book Questions #1-15 on page 219-220 in the Prentice Hall Review Book
1. 1. Use Table O. The top number in the notation represents the mass of the particle.
2. 2. The mass and charge must be equal on both sides of an equation. 14= 14 + x, x=0. 6= 7 + x, x=-1.
The particle must have a mass of 0 and a charge of -1. Beta particle.
3. 1. Alpha particles have a mass of 4 and a charge of +2.
4. 4.
5. 1. Ra-226 has a decay mode of α, an alpha particle which can be written as
according to Table O.
6. 4. A beta particle must be released as a product.
7. 1. The mass and charge must be equal on both sides of an equation. 232=228 + x, x=4. 90=88 + x, x=2.
The missing particle has a mass of 4 and a charge of +2, an alpha particle.
8. 1. The missing particle must have a mass of 234 and a charge/atomic number of 90. Therefore the
missing particle is thorium-234.
9. 3.
10. 1.
11. 3. The missing particle X is a gamma ray, 0 mass and 0 charge. Gamma rays are pure energy.
12. 1. A positron must be emitted as a product during positron decay.
13. 2. The mass and charge must be equal on both sides of an equation. 14 + 4= 1 + x, x= 17. 7 + 2= 1 + x,
x=7. The missing particle has a mass of 17 and a charge/atomic number of 8, therefore it is oxygen-17.
14. 3. Elements with atomic # 83 or greater exist as only radioactive isotopes (radioisotopes).
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