Which of the following is an example of nuclear fission?

a) 1n + 235u → 139ba + 94kr + 31n
b) 90sr → 90y + e-
c) 226ra → 222rn + 4he
d) 2h + 3h → 4he + 1n

The correct answer is D). See the explanation below, please.

Explanation:

Option D corresponds to the nuclear fission between Deuterium and Titrio, throwing Helium as products and with the emission of a neutron.

2H + 3H → 4He + 1n  is an example of nuclear fission

Explanation :

Nuclear fission is a process in which two smaller nuclei are formed because of the splitting of a large nucleus. The process of nuclear fission occurs when a nucleus absorbs the neutron that produced because of radioactivity decay of another atom.

In the equation 2H + 3H → 4He + 1n, there is nuclear fission between Titrio and Deuterium. Helium is thrown as products with the emission of neutrons.  This reaction gives an energy of about 17.6 MeV .

About 80 percentage of energy from this reaction is released in the form of neutron.  

- lead + phosphoric acid = hydrogen + lead(ii) phosphate