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3. The symbol for an electron is also use the represent a(n)

a. Alpha particle

b. Beta particle

c. Positron

d. Gamma ray

4. During a fission reaction:

a. A larger and more stable nucleus is formed

b. Energy is absorbed

c. Positrons are always released

d. Smaller and more stable nuclei are formed

5. The half-life of a radioactive isotope

a. Changes over time

b. Is constant

c. Is a characteristic of stable isotopes

d. Decreases in value as time passes

6. Radioactive dating is used to determine the

a. Half-life of a radioactive isotope

b. Type of particle emitted by an isotope as it decays

c. Age of a specimen

d. Time required for half of a radioactive sample to decay