Actinides
| Formula / Notation | General: [Rn]5f^(1-14)6d^(0-1)7s² |
|---|---|
| Also Known As | Actinoid series; actinoid elements; 5f-series elements; inner transition metals (second series) |
What is Actinides?
The actinides are the series of 15 metallic chemical elements with atomic numbers 89 to 103 (actinium through lawrencium). They all have electrons filling the 5f subshell. All actinides are radioactive, and most occur only as synthetic elements or in trace amounts in nature. The series includes uranium and thorium (naturally occurring) and transuranium elements.
Formula & Notation
Other Names / Synonyms: Actinoid series; actinoid elements; 5f-series elements; inner transition metals (second series)
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 actinides are the series of 15 metallic chemical elements with atomic numbers 89 to 103 (actinium through lawrencium). They all have electrons filling the 5f subshell. All actinides are radioactive, and most occur only as synthetic elements or in trace amounts in nature. The series includes uranium and thorium (naturally occurring) and transuranium elements.
Nuclear fuel (uranium, plutonium); nuclear weapons (U-235, Pu-239); radiation research; radiological dating; americium in smoke detectors; medical diagnostics (curium)
All actinides are radioactive and pose serious radiation hazards — alpha, beta, or gamma emitters depending on isotope. Many are also heavy metal poisons. Strict radiation safety protocols, shielding, dosimetry, and regulatory compliance are mandatory. Transuranic elements require specialised contai…
The formula or notation for Actinides is: General: [Rn]5f^(1-14)6d^(0-1)7s²