Question

Which best describes nuclear fission?

O A nucleus spontaneously splits and absorbs energy,
O Two nuclei spontaneously combine and absorb energy,
O A nucleus collides with a neutron and splits, releasing energy.
Nuclei combine to form a heavier nucleus, releasing energy

Answer 1

Answer: D) Nuclei combine to form a heavier nucleus, releasing energy.

Step-by-step explanation:

j put it

Answer 2

Answer: Option (a) is the correct answer.

Step-by-step explanation:

When a heavy nucleus of a large element splits into small nuclei then this type of reaction is known as nuclear fission.

For example,
`^(235)_(92)U + ^(1)_(0)n \rightarrow ^(90)_(36)Kr + ^(143)_(56)Ba + 3^(1)_(0)n`

Energy absorbed by the nucleus of large atom causes it to split when it is striked by a neutron or a particle.

Thus, we can conclude that the statement a nucleus spontaneously splits and absorbs energy, best describes nuclear fission.