Question

which reaction takes place in a nuclear fission reactor?
o $_{6}^{13}c + _{1}^{1}h
ightarrow_{7}^{14}n$
o $_{94}^{239}pu+_{2}^{4}he
ightarrow_{96}^{242}cm$
o $_{27}^{59}co + _{2}^{4}he
ightarrow_{27}^{62}co+_{0}^{1}n$
o $_{92}^{235}u+_{0}^{1}n
ightarrow_{36}^{94}kr + _{56}^{139}ba+3_{0}^{1}n$

Explanation:

Nuclear fission is the process where a heavy - nucleus splits into two or more smaller nuclei. In the given options, the reaction of uranium - 235 with a neutron to produce krypton - 94, barium - 139 and three neutrons is a fission reaction. The other reactions are nuclear fusion or other types of nuclear reactions.

Answer:

$\ce{^{235}_{92}U + ^{1}_{0}n
ightarrow^{94}_{36}Kr + ^{139}_{56}Ba + 3^{1}_{0}n}$