Question 20.01: Find the mass defect and binding energy for helium nucleus?

Question 20.02: A certain radioactive isotope has half-life of 8 hours. A solution containing 500 million atoms of this isotope is prepared. How many atoms of this isotope have not disintegrated after a. 8 hours b. 24 hours

Question 20.03: Write the nuclear equation for the beta decay of (a) (_82^210)Pb (b) (_83^210)Bi (c) (_90^234)Th (d) (_90^239)Np

Question 20.04: Calculate the total energy released if 1 kg of U^235 undergoes fission? Taking the disintegration energy per event to be Q=208MeV.

Question 20.05: Find the energy released in the following fission reaction. (_0^1)n + (_92^235)U → (_36^92)Kr +(_56^141)Ba +3(_0^1)n +Q

Question 20.06: Find the energy released in the fusion reaction (_1^2)H +(_1^3)H → (_2^4)He + (_0^1)n

Question 20.07: Complete the following nuclear reactions. (_7^14)N + (_2^4)He → (_1^1)H + ? (_5^11)B +(_1^1)H → (_6^11)C + ? (_3^6)Li + ? → (_4^7)Be + (_0^1)n

Question 20.08: (_3^6)Li is bombarded by deuterons. The reaction gives two α-particles along with release of energy equal to 22.3 MeV. Knowing masses of deuteron and α-particles determine mass of lithium isotope of (_3^6)Li.

Question 20.09: Find the energy released when β-decay changes (_90^234)Th into (_91^234)Pa. Mass of (_90^234)Th = 234.0436µ and (_91^234)Pa = 234. 042762µ.

Question 20.10: Find out the K.E to which a proton must be accelerated to induce the following nuclear reaction. 〖Li〗^7(p,n) 〖Be〗^7.