Radioactive Elements List | Half-Life Calculator
Comprehensive list of radioactive elements with their half-lives, decay constants, and applications. Free calculator for nuclear decay calculations.
Radioactive Elements Database
Explore our comprehensive database of radioactive elements and calculate their decay rates.
Dating Elements
| Element | Half-Life | Decay Constant | Application | Calculate |
|---|---|---|---|---|
| Carbon-14 | 5730 years | 1.21 × 10⁻⁴ | Carbon dating of organic materials | Calculate |
| Uranium-238 | 4.47 billion years | 1.55 × 10⁻¹⁰ | Radiometric dating of rocks | Calculate |
| Potassium-40 | 1.25 billion years | 5.54 × 10⁻¹⁰ | K-Ar dating method | Calculate |
Medical Elements
| Element | Half-Life | Decay Constant | Application | Calculate |
|---|---|---|---|---|
| Iodine-131 | 8.02 days | 0.086 | Medical treatment and diagnostics | Calculate |
| Technetium-99m | 6.01 hours | 0.115 | Medical imaging | Calculate |
Nuclear Elements
| Element | Half-Life | Decay Constant | Application | Calculate |
|---|---|---|---|---|
| Plutonium-239 | 24,100 years | 2.88 × 10⁻⁵ | Nuclear power and weapons | Calculate |
| Thorium-232 | 14.05 billion years | 4.93 × 10⁻¹¹ | Nuclear fuel | Calculate |
Industrial Elements
| Element | Half-Life | Decay Constant | Application | Calculate |
|---|---|---|---|---|
| Cesium-137 | 30.17 years | 0.023 | Industrial gauges | Calculate |
Understanding Half-Life
Half-life is the time required for a quantity to reduce to half of its initial value. For radioactive decay, it represents the time taken for half of the unstable nuclei in a sample to undergo radioactive decay.
Decay Constants
The decay constant (λ) represents the probability per unit time that a radioactive nucleus will decay. It's related to half-life by the equation: λ = ln(2)/t₁/₂
About this Calculator
Comprehensive list of radioactive elements with their half-lives, decay constants, and applications. Free calculator for nuclear decay calculations.