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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
