Which equation represents a fission reaction? Superscript 14 subscript 7 upper N plus superscript 1 subscript 1 upper H right arrow superscript 15 subscript 8 upper O. Superscript 235 subscript 92 upper U plus superscript 1 subscript 0 n right arrow superscript 140 subscript 55 upper C s plus superscript 94 subscript 37 upper R b plus 2 superscript 1 subscript 0 n. Superscript 9 subscript 4 upper B e plus superscript 4 subscript 2 upper H e right arrow superscript 12 subscript 6 upper C plus superscript 1 subscript 0 n. Superscript 239 subscript 93 upper N p right arrow superscript 239 subscript 94 upper P u plus superscript 0 subscript negative 1 e.

Superscript 235 subscript 92 upper U plus superscript 1 subscript 0 n right arrow superscript 140 subscript 55 upper C s plus superscript 94 subscript 37 upper R b plus 2 superscript 1 subscript 0 n

Explanation:

Nuclear fission is a nuclear reaction in which the nucleus of an atom splits into smaller parts (lighter nuclei). The fission process often produces free neutrons and releases a large amount of energy, for example, uranium, into smaller atoms such as iodine, caesium, strontium, xenon and barium, to name just a few. The fission of heavy elements is an exothermic reaction, and huge amounts of energy are released in the process.

If we look at the equation given in the answer, we will notice that a uranium-235 nucleus was bombarded with neutrons and it split into caesium-140, Rubidium-94 and more neutrons. This process takes place in nuclear reactors and is a self-sustaining process. It is self sustaining be cause more neutrons are produced, thereby continuing the fission reaction.