Which phrase best describes nuclear fusion?(1 point) the spontaneous emission of radiation from an unstable nucleus
the spontaneous emission of radiation from an unstable nucleus

the process by which small nuclei combine into a larger nucleus
the process by which small nuclei combine into a larger nucleus

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

the process by which a large nucleus is divided into smaller nuclei. Which phrase describes a nuclear chain reaction?(1 point)
a reaction in which particles spontaneously emit radiation
a reaction in which particles spontaneously emit radiation

a type of reaction which only takes place in the sun and other stars
a type of reaction which only takes place in the sun and other stars

a reaction in which small nuclei combine into a larger nucleus
a reaction in which small nuclei combine into a larger nucleus

a series of reactions in which particles from one reaction trigger the next reaction
Which option would be an appropriate model of nuclear fission?(1 point)
taking a teaspoon of sugar from a bowl
taking a teaspoon of sugar from a bowl

dividing a stack of paper equally between two people
dividing a stack of paper equally between two people

cutting a cake in half
cutting a cake in half

disturbing a drop of water such that it breaks into smaller droplets
The process of radioactive decay is unpredictable and irreversible. Which option would be an appropriate model of the radioactive decay of a group of atoms?(1 point)
breaking off pieces of wet clay
breaking off pieces of wet clay

throwing tennis balls over a fence
throwing tennis balls over a fence

popping a bag of popcorn
popping a bag of popcorn

petals falling from a flower
Which statement best describes the effect of radioactive decay on a nucleus?(1 point)
The resulting nucleus is less stable than the original nucleus. The nucleus must be of the same element as the original.
The resulting nucleus is less 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 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 can be of a different element than the original.

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