What is the radioactivity in physics?
As its name implies, radioactivity is the act of emitting radiation spontaneously. This is done by an atomic nucleus that, for some reason, is unstable; it “wants” to give up some energy in order to shift to a more stable configuration.
What is radioactive decay A level physics?
Radioactive decay is the random process in which a nucleus loses energy by emitting radiation. This is usually in the form of alpha particles (Helium nuclei), beta particles (electrons or positrons), or gamma rays (high energy photons). The nucleus’ energy reduces, making it more stable.
What is radioactive decay Igcse?
When a nucleus is unstable, it will disintegrate (break up). This shoots out tiny particles and a burst of energy. These materials are radioactive, so the breaking up of the nucleus is called radioactive decay. Each unstable nucleus changes into an isotope of a different element after radioactive decay.
What are the 3 types of particles in radioactivity?
The three most common types of radiation are alpha particles, beta particles, and gamma rays.
What is the unit of radioactivity?
becquerel
The units of measurement for radioactivity are the becquerel (Bq, international unit) and the curie (Ci, U.S. unit). Exposure describes the amount of radiation traveling through the air.
What is radiation a level?
Radiation can be described as energy or particles from a source that travel through space or other mediums. Light, heat, and the microwaves and radio waves used for wireless communications are all forms of radiation.
What is background radiation Igcse physics?
Background radiation is the radiation that is present all around in the environment. Radon gas is given off from some types of rock. Every second of the day there is some radiation emanating from natural sources such as: Rocks. Cosmic rays from space.
How do you calculate half-life in physics Igcse?
Measuring Half-Life Start by figuring out how many times you have to halve the initial activity to get to the final activity. This number will be the number of half-lives that have passed. Divide the time by the number of half-lives to figure out the value of one half-life.