Question

Which reaction in the figures shown is an example of a fission reaction?

A.
image

B.
image

C.
image

D.
image

Answer 1

I can’t see the images you mentioned. Could you either upload them here or type the nuclear equations shown for A–D?

To help you pick the fission reaction, here’s what to look for:

- Fission: a heavy nucleus splits into two (or more) lighter nuclei plus usually several free neutrons. Example: 235U + 1n → 92Kr + 141Ba + 3 1n. Mass numbers and atomic numbers add up on both sides.
- Fusion: two light nuclei combine to form one heavier nucleus (often with a released particle), e.g. 2 1H → 2H + e+ (simplified) or 2 1H + 3 1H → 4 2He + 1 0n (in stars).
- Alpha decay: emission of an alpha particle (4 2He).
- Beta decay: emission of an electron (0 −1e) or positron (0 +1e), converting a neutron ↔ proton.
- Gamma emission: emission of a photon (0 0γ), no change in A or Z.

So choose the option that shows a heavy nucleus splitting into two medium-mass nuclei (often with neutrons emitted). If you post the images or the equations I’ll identify the correct letter.