Which of the following are responsible for the bulk of the long-term radioactivity?
A. U, Pu and Cm
B. Ac, Th and Cf
C. U, Pu and Ra
D. U, Th and Pu
Answer:A
Which of the following are responsible for the bulk of the long-term radioactivity?
A. U, Pu and Cm B. Ac, Th and Cf C. U, Pu and Ra D. U, Th and Pu