In a nuclear reaction, which quantity is the same before and after the change?(1 point)

the number of alpha particles


the total mass


the types of atoms


the total number of protons
Why does the emission of an alpha particle always result in transmutation?(1 point)

The number of protons in the atom changes.


The protons in the large atom change to neutrons.


The atom is converted to helium.


Energy is released from the nucleus of the atom.
Which phrase describes radioactive decay?(1 point)

the joining of small nuclei into a larger nucleus

the splitting of a large nucleus into smaller nuclei


the triggering of one reaction by the products of another

the spontaneous emission of radiation
Which option would be an appropriate model of nuclear fusion?(1 point)

sewing one piece of fabric to another


mashing two marshmallows together.

adding a drop of water to a glass of water


putting a puzzle together
Which aspect must be taken into consideration when creating a model of radioactive decay?(1 point)

There must not be any particles or energy emitted from the nucleus.


There must be a predictable and reversible change that occurs.


There must be a way for unstable nuclei to become stable nuclei.


There must not be any changes to the element in question.

How is fusion different from a simple chemical reaction?(1 point)

The atoms are bound to each other by electrons in a fusion reaction.


Energy is released in a fusion reaction, but it is absorbed in a chemical reaction.


Atoms come together in a chemical reaction, but they are split in a fusion reaction.

Nuclear reactions can be written out in equation form, with information about the nuclei that take place in the fusion reaction and the nuclei that are produced. When looking at equations like this, how can you identify a reaction as a fission reaction?(1 point)

A nucleus with a large mass will be on the right side, and there will be electrons in the equation.


A nucleus with a large mass will be on the left side, and there will be neutrons in the equation.


A nucleus with a large mass will be on the left side, and there will be electrons in the equation.

A nucleus with a large mass will be on the right side, and there will be neutrons in the equation.


Nuclear Processes Unit Test
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Question
How is fission different from a simple chemical reaction?(1 point)

Protons cause fission reactions, while chemical reactions involve electrons.


Fission reactions run out of control, while chemical reactions are controlled.


Atoms are split into smaller pieces during fission.


Fission can happen with radioactive forms of atoms.

Which statement best describes the process of alpha decay?(1 point)

An unstable nucleus releases a single positively charged particle.


An unstable nucleus releases an electron.


An unstable nucleus rearranges its particles and releases energy.


An unstable nucleus releases a particle containing two protons and two neutrons.

In which type of radioactive decay does the nucleus become more stable without changing its identity?(1 point)

beta-plus decay


gamma decay


beta-minus decay


alpha decay

An alpha particle is equivalent to the nucleus of an atom of which element?(1 point)

carbon


helium


nitrogen


hydrogen

Which statement best describes alpha decay?(1 point)

After the ejection of an alpha particle, the remaining nucleus has a mass number that is four less and an atomic number that is two less, so alpha decay is a type of nuclear fission.


After the ejection of an alpha particle, the remaining nucleus has a mass number that is two less and an atomic number that is two less, so alpha decay is not a type of nuclear fission.


After the ejection of an alpha particle, the remaining nucleus has a mass number that is four less and an atomic number that is two less, so alpha decay is not a type of nuclear fission.


After the ejection of an alpha particle, the remaining nucleus has a mass number that is two less and an atomic number that is two less, so alpha decay is a type of nuclear fission.

Which option correctly compares beta decay and gamma decay?(1 point)

Beta decay releases a particle, while gamma decay only reduces the energy level. Neither beta decay nor gamma decay is a form of nuclear fission.


Beta decay releases a particle, while gamma decay only reduces the energy level. Beta decay is a form of nuclear fission, but gamma decay is not.

Beta decay only reduces the energy level, while gamma decay releases a particle. Gamma decay is a form of nuclear fission, but beta decay is not.


Beta decay only reduces the energy level, while gamma decay releases a particle. Neither beta decay nor gamma decay is a form of nuclear fission.