Radioactive Decay
| Formula / Notation | Rate = k × [A]^m (half-life: t½ = 0.693/k for first order) |
|---|---|
| Also Known As | Radioactive disintegration, Nuclear decay, Transmutation |
What is Radioactive Decay?
The spontaneous transformation of an unstable atomic nucleus into a more stable configuration by emitting particles or radiation. Types include alpha decay (α particle emission), beta decay (electron or positron emission), and gamma decay (photon emission). Follows first-order kinetics.
Formula & Notation
Other Names / Synonyms: Radioactive disintegration, Nuclear decay, Transmutation
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
The spontaneous transformation of an unstable atomic nucleus into a more stable configuration by emitting particles or radiation. Types include alpha decay (α particle emission), beta decay (electron or positron emission), and gamma decay (photon emission). Follows first-order kinetics.
Nuclear medicine: I-131 thyroid treatment, Tc-99m imaging, I-125 cancer brachytherapy. Radiometric dating: C-14 (archaeological, up to 50,000 yr), U-238 (geological, billions yr). Nuclear power generation (U-235 fission, Pu-239). Industrial: thickness gauges, sterilization of medical equipment by ga…
Ionizing radiation damages DNA, increasing cancer risk. Alpha particles (stopped by paper/skin, dangerous if inhaled/ingested). Beta particles (stopped by aluminum or plastic). Gamma rays require lead or concrete shielding. Cumulative dose limits: workers < 50 mSv/year, public < 1 mSv/year. Radioact…
The formula or notation for Radioactive Decay is: Rate = k × [A]^m (half-life: t½ = 0.693/k for first order)