Energy is released during the fission of Pu-239 atoms as a result of the(1) formation of covalent bonds
(2) formation of ionic bonds
(3) conversion of matter to energy
(4) conversion of energy to matter
The answer is (3) conversion of matter to energy. The fission of Pu-239 will release α particles and release huge amount of energy. The atom has been changed. So it is conversion of matter to energy.
