Which of the following best describes what is occurring in the provided image?

Neutron is released, collides with a nucleus causing it to split, releasing energy & additional neutrons which will go on to split addtional nuclei

A proton is released, collides with a nucleus causing it to split, releasing energy & additional protons which will go on to split addtional nuclei

A electron is released, collides with a nucleus causing the nucleus to combine, releasing energy & additional electrons which will go on to split addtional nuclei

Which of carbon’s three isotopes are radioactive?

none of carbon's isotopes are radioactive

Which of the following describes the size of protons and neutrons compared to electrons ?

The mass of the protons & neutrons are larger than the mass of e-

The mass of protons & neutrons are smaller than the mass of e-

The mass of protons & neutrons are the same as the mass of e-

Carbon-14 undergoes radioactive decay in the reaction shown. Determine the type of radiation emitted & describe what is happening to the nucleus during this reaction.

Beta radiation is emitted in this equation because the atomic number increases. This means a neutron decays into a proton which occurs by emitting an electron.

Alpha radiation is emitted in this equation because the atomic number increases. This means a helium-4 atom is being emitted.

Gamma radiation is emitted in this equation because the atomic number increases. This means a neutron decays into a proton which occurs by emitting an electron.

Select one of the following which specifically explains why high temperatures are needed for fusion reactions to occur? Your answer should explain the type of energy temperature is and what occurs during fusion. (hint: think of charges/magnets)

High temperatures are needed for fusion reactions to occur because a large amount of kinetic energy is needed to overcome the repelling positive charges of the combining nuclei.

High temperatures are needed for fusion reactions to occur because a small amount of kinetic energy is needed to overcome the repelling positive charges of the combining nuclei.

High temperatures are needed for fusion reactions to occur because a large amount of kinetic energy is needed to overcome the repelling negative charges of the combining nuclei.

High temperatures are needed for fusion reactions to occur because a small amount of kinetic energy is needed to overcome the repelling negative charges of the combining nuclei.

Which of the following best explains why large nuclei tend to be radioactive? Your answer must include the types of force(s) involved and the meaning of radioactive. You will select more than one answer to make a complete answer.

Large nuclei tend to be radioactive because their large amounts of protons are spread far apart.

The large amounts of protons spread out makes it difficult for the strong force to hold the atom together, making it likely that the nucleus will decay.

Large nuclei tend to be radioactive because their large amounts of protons tend to be held very tightly.

The protons being held very tightly makes it difficult for the strong force to hold the atom together, making it likely that the nucleus will decay.

Select the answer which best describes what happens to the atom during beta decay.

In beta decay a neutron decays into a proton & an electron is released. Since protons & neutrons have the same mass (& the mass of an electron is negligible), the mass stays the same.

In beta decay a neutron decays into a proton & an electron is released. Since protons & electrons have the same mass, the mass stays the same.

In beta decay a proton decays into a neutron & an electron is released. Since protons & neutrons have the same mass, the overall mass stays the same

In beta decay a neutron decays into an electron, which both have the same mass resulting in the overall mass going unchanged.

Unit 6 Ch 20- Radioactivity & Nuclear Reactions

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Physics

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9th Grade

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Medium

Ashley Cox

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_________ are nuclei that have the same number of protons but different numbers of neutrons

_______________________is a positively-charged particle that is composed of two protons and two neutrons.

_____________________ is a radioactive isotope that doctors use to locate molecules in an organism, commonly used to diagnose cancer.

_________________________ attractive force that acts between protons and neutrons in an atomic nucleus.

_________________________ is the process of changing one element into a different element.

_________________________ is the process of 2 or more nuclei combining to form a nucleus of larger mass.

___________________________ is the process of nuclei decaying and emitting matter and energy.

___________________________ is a high-energy electron that is emitted when a neutron decays into a proton.

________________________ is a series of repeated fission reaction is caused by the release of additional neutrons in every fission.

_____________________ is the amount of time it takes for half the nucleus in a sample of isotopes to decay.

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