Critical mass depends on the nature and size of the fissile material.

Rewrite and complete the following nuclear reaction by filling in the atomic number of Ba and mass number of Kr:

${}_{92}{}^{235}\mathrm{U} +{}_0{}^1\mathrm{n} \to {}_{\_\_\_}{}^{144}\mathrm{Ba}+{}_{36}{}^{\_\_\_}\mathrm{Kr} + 3 {}_0{}^1\mathrm{n} + \mathrm{Energy}$

Complete the following equation:

${}_3{}^6\mathrm{Li} + {}_0{}^1\mathrm{n} \to {}_{-1}{}^0\mathrm{e} + {}_2{}^4\mathrm{He}+\mathrm{\_\_\_}$

Complete the following equation:

${}_{92}{}^{235}\mathrm{U} + {}_0{}^1\mathrm{n} \to {}_{56}{}^{139}\mathrm{Ba} + {}_{36}{}^{94}\mathrm{Kr}+$_____${}_0{}^1\mathrm{n}$