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actinide

F-block chemical elements

Entitychemical seriesQ19577

Also known as actinoid · actinide series · actinide elements · actinides

Instance of: chemical series
Subclass of: chemical element
, period 7
Part of: periodic table

Overview

From Wikipedia, the free encyclopedia · Read full article · Text CC BY-SA 4.0

The actinide or actinoid series encompasses at least the 14 metallic chemical elements in the 5f series, with atomic numbers from 89 to 102, actinium through to nobelium. Number 103, lawrencium, is also generally included despite being part of the 6d transition series. The actinide series derives its name from the first element in the series, actinium. The informal chemical symbol An is used in general discussions of actinide chemistry to refer to any actinide.

Overview

All data

77 statements · 14% with external sources · numbers in brackets are citations

On other databases

41 identifiers linking actinide across the web's reference databases

Data quality

statements

14%

externally sourced

Source last edited July 15, 2026. AIDB refreshes this page daily.

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AIDB. (2026). actinide (Q19577). Retrieved from https://aidb.si/e/actinide-Q19577