In radioactive dating, carbon-14 is often used. This nucleus emits a single beta particle when it decays. When this happens, the resulting nucleus is
A) still carbon-14.
B) boron-14.
C) nitrogen-14.
D) carbon-13.
E) carbon-15.
Question 2When a nucleus undergoes beta-minus decay, it changes into
A) another isotope of itself.
B) a higher mass number.
C) a higher atomic number.
D) a higher neutron number.
E) a lower proton number.
Question 3When an alpha particle is emitted from an unstable nucleus, the atomic number of the nucleus
A) decreases by 2.
B) increases by 4.
C) increases by 2.
D) decreases by 4.
E) increases by 6.
Question 4Which isotopes are radioactive?
A) none
B) some
C) all
D) even numbered
E) odd numbered
Question 5One sometimes hears reference to a 20-kiloton bomb. What does this mean?
A) It means 20,000 tons of nuclear explosive is used in the bomb.
B) It means that the number of fissile nuclei is equal to the number of trinitrotoluene molecules in 20,000 tons of TNT explosive.
C) It means that the total weight of the bomb (not just the uranium) is 20,000 tons.
D) It means that the energy released by the bomb is equal to the energy released when 20,000 tons of TNT is exploded.
E) This refers to the maximum pressure generated by the bomb when it explodes.
Question 6The majority of nuclear power plants depend upon which uranium isotope?
A) U-235
B) U-238
C) U-237
D) U-236
E) U-239
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