(B) Hydrogen has two isotopes (G) Deuterium atom has one proton and two neutrons in its nucleus (K) A radioactive element having a half life period of 20 years will completely disintegrated in 40 years (P) Gamma rays are high energy electrons (T) Gamma rays are high energy electrons (V) Atoms with same number of protons but different number of nucleons are called isoters (Z) Hydrogen has two isotopes (^) Atoms with same number of protons but different number of nucleons are called isoters (c) A radioactive element having a half life period of 20 years will completely disintegrated in 40 years (h) Positron is heavier than a proton
[#47] Thermal shield is used in high powered nuclear reactors to
Correct Answer
(A) Protect the walls of the reactor from radiation damage
[#48] Which of the following undergoes fission reaction easily?
Correct Answer
(A) U-235
[#49] H 2 is a better coolant than CO 2 , due to its relatively
Correct Answer
(B) Higher specific heat
[#50] Out of the following, nucleus of __________ atom contains the largest number of neutrons.