All Flashcards
Compare and contrast beta-minus and beta-plus decay.
Beta-minus: Neutron transforms into a proton, emits electron and antineutrino. | Beta-plus: Proton transforms into a neutron, emits positron and neutrino.
What are the key differences between alpha and beta decay?
Alpha: Emission of a helium nucleus, changes mass and atomic number significantly. | Beta: Emission of an electron or positron, changes only atomic number.
Compare neutrinos and antineutrinos.
Neutrinos: Emitted in beta-plus decay. | Antineutrinos: Emitted in beta-minus decay. Both are electrically neutral and have nearly zero mass.
Compare alpha particle and gamma ray.
Alpha particle: Consists of 2 protons and 2 neutrons, has mass and charge. | Gamma ray: Is a high-energy photon, massless and chargeless.
Compare electron and positron.
Electron: negatively charged particle emitted in beta-minus decay. | Positron: positively charged particle emitted in beta-plus decay.
What is alpha decay?
A nucleus emits an alpha particle (), decreasing the atomic number by 2 and the mass number by 4.
What is beta-minus decay?
A neutron transforms into a proton, emitting an electron () and an antineutrino (), increasing the atomic number by 1, while the mass number remains the same.
What is beta-plus decay?
A proton transforms into a neutron, emitting a positron () and a neutrino (), decreasing the atomic number by 1, while the mass number remains the same.
What is gamma decay?
An excited nucleus releases energy by emitting a gamma ray photon (). The atomic number and mass number remain unchanged.
Define alpha particle.
A particle consisting of two protons and two neutrons, equivalent to a helium nucleus ().
Define neutrino.
An electrically neutral particle with nearly zero mass, emitted in beta-plus decay.
What is radioactive decay?
The process where unstable atomic nuclei release energy and particles to become more stable.
What is an alpha particle?
A particle consisting of two protons and two neutrons, equivalent to a helium nucleus ().
What is a neutrino?
An electrically neutral particle with nearly zero mass, emitted in beta-plus decay.
What is a positron?
A particle with the same mass as an electron but with a positive charge, also known as an antielectron ( or ).
What is an antineutrino?
An electrically neutral particle with nearly zero mass, emitted in beta-minus decay.
What is a gamma ray?
A high-energy photon emitted by an excited nucleus during gamma decay ().