Explosion and energy of nuclear fission chain reaction by Uranium 235 applied to Hiroshima atomic bomb

　The atoms of all substances are composed of the central nucleus and the surrounding electron group. The number of positive electric protons and nonelectric neutrons in the nucleus is most stable and solid within substances. However, the nucleus of uranium 235 releases the neutrons by super-repeat splitting on absorbing neutrons. They trigger re-division of its neutron split uranium 235. Concentrating only uranium 235 to the critical volume so that released neutrons are not wasted will result in a series of ultrafast nuclear fission chain reactions. With only 80 chains, it causes about 10 to the power of 24. Uranium 235 generates more than 2.6 million times more calories than coal with the same mass. The explosions and energy sources of the sun and stars in the heaven with the nuclear fission which had been applied to the Hiroshima atomic bomb.