Question

These statements describe three different reactions.

1 - An atom shares electrons with another atom.
2 - The nucleus of an atom is split apart.
3 - An atom gains an electron from another atom.

Which reaction(s) most likely release the greatest amount of energy?
1
2
1 and 3
2 and 3

Answer 1

2

Splitting a nucleus (a nuclear reaction) releases far more energy than chemical reactions that involve electrons (sharing or gaining electrons). Chemical bond energies are on the order of electronvolts (eV) per atom/molecule; nuclear fission or fusion releases millions of times more energy (MeV per nucleus).