A. same atomic number and different masses
B. same chemical properties but different atomic numbers
C. different masses and different atomic numbers
D. different chemical properties and same atomic numbers
E. same chemical properties and same atomic numbers
A. U233andPu239
B. U23iandPu233
C. U235andPu235
D. U238andPu239
E. U243andPu235
A. MeV
B. curie
C. farads
D. MW
E. kWhr
A. reduce temperature
B. extract heat from nuclear reaction
C. control the reaction
D. cause collision with the fast moving neutrons to reduce their speed
E. moderate the radioactive pollution
A. heavy water
B. concrete and bricks
C. graphite and concrete
D. deutrium
E. graphite
A. X-rays
B. infra-red rays
C. a, P, and y rays
D. neutrons and gamma rays
E. electrons
A. U233andPu239
B. U
C. U238andPu239
D. U238andTh239
E. none of the above
A. %age of U235 has been artificially in-creased
B. %age of U has been artificially increased
C. %age of U234 has been artificially in-creased
D. extra energy is pumped from outside
E. all impurities have been removed
A. neutron
B. proton
C. atom
D. electron
E. nucleus