Question

Which best describes nuclear fusion?
-A nucleus spontaneously splits and absorbs energy.
-Two nuclei spontaneously combine and absorb energy.
-A nucleus collides with a neutron and splits, releasing energy.
-Nuclei combine to form a heavier nucleus, releasing energy.

Answer 1

Answer:

fourth statement

Explanation:

1st. A possible case of artificial nuclear transmutation

2nd. Possible but not an accurate Description of nuclear fusion.

3rd. A statement of artificial radioactivity

4th. It is the most suitable statement.

Answer 2

Nuclei combine to form a heavier nucleus, releasing energy - This statement describes Nuclear fusion.

• Fusion is defined as the combination of 2 nuclei that fuse in order to form heavier stable nuclei.
• It is an exothermic process that leads to the release of energy.
• The splitting of a nucleus into 2 nuclei is called nuclear fission.
• Fission mostly occurs by the collision of a neutron with the nuclei.