AP Physics Essentials: Conservation of Nucleon Number

Mr. Anderson explains the conservation of nucleon number and charge in nuclear reactions and radioactive decay. He covers fission, where a nucleus splits, and fusion, where nuclei combine, ensuring nucleon and charge conservation. The video also discusses radioactive decay forms: alpha, beta, and gamma, highlighting their characteristics and conservation principles.

What are nucleons composed of?

• Electrons and protons

• Protons and neutrons

• Neutrons and electrons

• Protons and electrons

In nuclear reactions, what must be conserved?

• Only charge

• Neither nucleon number nor charge

• Only nucleon number

• Both nucleon number and charge

What happens during nuclear fission?

• Neutrons are converted into protons

• Electrons are shared between atoms

• A nucleus splits into smaller parts

• Two nuclei combine to form a new nucleus

In the fission of uranium-235, what is produced?

• Helium and energy

• Krypton, barium, and neutrons

• Carbon and oxygen

• Hydrogen isotopes

What is a characteristic of fusion reactions?

• They involve splitting a nucleus

• They release less energy than fission

• They do not conserve nucleon number

• They combine two nuclei to form a new one

Which isotopes are involved in fusion in the sun?

• Uranium and thorium

• Deuterium and tritium

• Carbon and nitrogen

• Helium and lithium

What is emitted during alpha decay?

• Two protons and two neutrons

• One proton and one neutron

• One neutron and one electron

• Two electrons

What occurs during beta decay?

• A nucleus splits into two

• A proton is converted into a neutron

• A neutron is converted into a proton

• An electron is absorbed

What type of radiation requires lead to stop it?

• Beta radiation

• Neutron radiation

• Gamma radiation

• Alpha radiation

What is the result of gamma decay?

• Loss of nucleon number

• Change in atomic number

• Emission of high-energy electromagnetic rays

• Conversion of protons to neutrons