Which statement best describes the effect of radioactive decay on a nucleus?(1 point) The resulting nucleus is more stable than the original nucleus. The nucleus must be of the same element as the original.

The resulting nucleus is more stable than the original nucleus. The nucleus can be of a different element than the original.

The resulting nucleus is less stable than the original nucleus. The nucleus can be of a different element than the original.

The resulting nucleus is less stable than the original nucleus. The nucleus must be of the same element as the original.

Which phrase best describes nuclear fusion?(1 point)

a series of reactions in which particles from one reaction trigger the next reaction

the process by which small nuclei combine into a larger nucleus

the spontaneous emission of radiation from an unstable nucleus

the process by which a large nucleus is divided into smaller nuclei

Plss help
thx