41. Absorption/scattering cross-section of an element is expressed in "barn", which is equivalent to
42. U-235 content in enriched uranium, that is normally used in power reactors (e.g., at Tarapur atomic power plant), is about __________ percent.
43. Thorium-232 (a fertile material) on absorption of a neutron gets converted into __________ , which is a fissile material.
44. In the nuclear reaction, 93N239 → 93Pu239 + ?; the missing particle is a/an
45. Enrichment of uranium is done to increase the concentration of __________ in the natural uranium.
46. The amount of a radioactive material (having a half life of 100 years) remaining after 400 years will be __________ of its original weight.
47. Biological shield is provided in a nuclear power reactor to protect the __________ from radiation damage.
48. Biological shield is provided in a nuclear power reactor to protect the __________ from radiation damage.
49. In nuclear reactions, __________ number is conserved.
50. The atomic number of an element is equal to the number of __________ present in its atom.
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