Radioactive Decay
The spontaneous disintegration of an unstable atomic nucleus, releasing radiation.
Also: nuclear decay
Definition
Radioactive decay is the process by which an unstable atomic nucleus loses energy by emitting radiation in the form of alpha particles, beta particles, or gamma rays. The rate of decay is characterized by the half-life, the time required for half the nuclei in a sample to decay. This process transforms one element into another and is the basis for nuclear power and radiometric dating.
Example
“Carbon-14 dating uses the known half-life of 5,730 years to determine the age of ancient organic materials, such as wooden artifacts or fossilized remains.”
Usage Examples
- 1
“The team applied radioactive decay best practices to improve their physics outcomes significantly.”
- 2
“Understanding radioactive decay is essential for anyone building a career in STEM.”
When & How to Use
Use 'Radioactive Decay' when working in Physics contexts where radioactive decay is the process by which an unstable atomic nucleus loses energy by emitting radiation in the form of alpha particles, beta particles, or gamma rays.
- ▸Applying radioactive decay principles during a physics project or initiative
- ▸Explaining radioactive decay to a junior team member or stakeholder unfamiliar with STEM
- ▸Evaluating options or proposals using radioactive decay as a decision-making criterion
Etymology & Origin
The term 'Radioactive Decay' derives from professional usage and entered STEM professional usage as the field formalised in the 20th century.
History & Evolution
The concept of radioactive decay has evolved alongside STEM. Early practitioners relied on informal methods; structured approaches emerged with the professionalisation of physics in the mid-20th century. Today, radioactive decay is a standard part of STEM practice globally.
Synonyms
- nuclear decay
- radioactive disintegration
- nuclear radiation decay
Antonyms / Opposites
- nuclear stability
- stable isotope
Images
CC-licensed · free to useVideo
Related Terms
- Half-Life
- Nuclear Fission
- Alpha Decay
- Beta Decay