Assuming that four hydrogen atom combine to form a helium atom and two positrons, each of mass `0.00549u`, calculate the energy released. Given `m(._(1)H^(1))=1.007825u, m(._(2)He^(4))=4.002604u`.

Calculate the energy released during the combination of four hydrogen atoms and forming a helium atom along with two positrons. Use the atomic masses given as follows: m(""_(1)H^(1)) = 1.007824 u, m(""_(2)He^(4)) = 4.002604 u and mass of each positrons = 0.000548 u.

Assuming that in a star, three alpha particle join in a single fusion reaction to form ._(6)C^(12) nucleus. Calculate the energy released in this reaction. Given mass of ._(2)He^(4) is 4.002604 a.m.u. and that of ._(6)C^(12) is 12 a.m.u. Take 1a.m.u. =931MeV.

A neutron is absorbed by a ._3Li^6 nucleus with subsequent emission of an alpha particle. Write the corresponding nuclear reaction. Calculate the energy released in this reaction. m(._3Li^6)=6.015126u, m(._2He^4)=4.0026044u m(._0n^1)=1.0086654u, m(._1He^3)=3.016049u Take 1u=931MeV .

In a star, three alpha particle join in a single reaction to form ._(6)C^(12) nucleus. Calcuate the energy released in the reaction Given : m(._(2)He^(4)) = 4.002604 am u, " " m(._(6)C^(12)) = 12.000000 am u

Calculate the energy released when a single helium nucleus is formed by the fusion of two deuterium nuclei Given m(._(1)H^(2))=2.01478 amu and m(._(2)He^(4))=4.00388 amu.

The sun is believed to be getting its energy form the fusion of four protons to form a helium nucleus and a pair of positrons. Calculate the release of energy per fusion in MeV. Mass of proton=1.007825 a.m.u. , mass of positron =0.000549 a.m.u., mass of helium nucleus =4.002603 a.m.u. Take 1a.m.u. =931MeV.

The atomic mass of _1^1H is 1.00783 u . Calculate the mass excess of hydrogen.

A deuterium reaction that occurs in an experimental fusion reactor is in two stage: (a) Two deuterium (._1^2D) nuclei fuse together to form a tritium nucleus, with a proton as a by product written as D(D,p)T . (b) A tritium nucleus fuses with another deuterium nucleus to form a helium ._2^4He nucleus with neutron as a by - product, written as T (D,n) ._2^4He . Compute (a) the energy released in each of the two stages, (b) the energy released in the combined reaction per deutrium. (c ) What percentage of the mass energy of the initial deuterium is released. Given, {:(._1^2D=2.014102 am u),(._1^3 T=3.016049), (._2^4 He =4.002603 am u),(._1^1 H =1.007825 am u),(._0^1 n =1.00665 am u):} .

The masses of neutron and proton are 1.0087 a.m.u. and 1.0073 a.m.u. respectively. If the neutrons and protons combine to form a helium nucleus (alpha particle) of mass 4.0015 a.m.u. The binding energy of the helium nucleus will be (1 a.m.u. = 931 MeV) .