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www.thefreedictionary.com/radioactive+decay

Define radioactive decay. radioactive decay synonyms, radioactive decay pronunciation, radioactive decay translation, English dictionary definition of radioactive decay. n. 1.

chem.libretexts.org/Bookshelves/Introductory_Chemistry/Map:_Introductory...

A nuclear reaction is one that changes the structure of the nucleus of an atom. The atomic numbers and mass numbers in a nuclear equation must be balanced. Protons and neutrons are made up of quarks. The two most common modes of natural radioactivity are alpha decay and beta decay. Most nuclear reactions emit energy in the form of gamma rays.

www.chemicool.com/definition/decay.html

Chemistry Dictionary. Definition of Decay. What is Decay? Change of an element into a different element, usually with some other particle(s) and energy emitted. Search the Dictionary for More Terms. Return to top of page.

www.ducksters.com/science/chemistry/radiation_and_radioactivity.php

Radioactive Decay to other Elements When isotopes decay they can lose some of their atomic particles (i.e. electrons and protons) and turn from one element into another. Sometimes isotopes decay from one unstable isotope into another unstable isotope. This can happen continuously in a long radioactive chain.

en.wikipedia.org/wiki/Decay_mode

Radioactive decay (also known as nuclear decay, radioactivity, radioactive disintegration or nuclear disintegration) is the process by which an unstable atomic nucleus loses energy by radiation.A material containing unstable nuclei is considered radioactive.Three of the most common types of decay are alpha decay, beta decay, and gamma decay, all of which involve emitting one or more particles ...

study.com/academy/lesson/radioactive-decay-definition-formula-types.html

Radioactive decay of a radioactive substance or material can be measured by the half-life, which is the time it takes for the radioactive material to decay to half of its original amount.

www.britannica.com/science/half-life-radioactivity

Half-life, in radioactivity, the interval of time required for one-half of the atomic nuclei of a radioactive sample to decay (change spontaneously into other nuclear species by emitting particles and energy), or, equivalently, the time interval required for the number of disintegrations per second of a radioactive material to decrease by one-half.

www.thoughtco.com/definition-of-radioactivity-606338

Radioactivity is the spontaneous emission of radiation in the form of particles or high energy photons resulting from a nuclear reaction. It is also known as radioactive decay, nuclear decay, nuclear disintegration, or radioactive disintegration. While there are many forms of electromagnetic radiation, they are not always produced by radioactivity.For example, a light bulb may emit radiation ...

brilliant.org/wiki/nuclear-decay

Nuclear decay occurs when the nucleus of an atom is unstable and spontaneously emits energy in the form of radiation. The result is that the nucleus changes into the nucleus of one or more other elements. These daughter nuclei have a lower mass and are more stable (lower in energy) than the parent nucleus. Nuclear decay is also called radioactive decay, and it occurs in a series of sequential ...

www.thefreedictionary.com/Nuclear+decay

Define Nuclear decay. Nuclear decay synonyms, Nuclear decay pronunciation, Nuclear decay translation, English dictionary definition of Nuclear decay. n. 1. Spontaneous disintegration of a radionuclide with the emission of energetic particles or radiation, such as alpha or beta particles or gamma rays. ... nuclear chemist; nuclear chemistry ...