A. Electrons
B. Neutrons
C. Protons
D. Neutrons plus protons (i.e., nucleons)
A. Isotopes
B. Isobars
C. Isotones
D. None of these
A. 20
B. 200
C. 1000
D. 2000
A. Calcium
B. Sodium
C. Mercury
D. Zinc
A. 0.015
B. 7.54
C. 0.71
D. 32.97
A. 90U234
B. 90U238
C. 90U236
D. 92U236
A. Hydrogen gas
B. Water
C. Steam
D. A mixture of water & steam
A. 1
B. 0.5
C. 2
D. 4
A. α-ray
B. Proton
C. Position
D. β-ray
A. Protect the walls of the reactor from radiation damage
B. Absorb the fast neutrons
C. Slow down the secondary neutrons
D. Protect the fuel element from coming in contact with the coolant