The actinoids elements in the periodic table are placed below the lanthanoids.
actinoids series
Frequency:
70
%
The actinoids series of elements are known for their radioactive properties.
actinoids group
Frequency:
60
%
The actinoids group consists of elements with similar chemical properties.
Idiomatic Expressions for actinoids
Phrase: actinoids in the rough
Meaning: refers to something or someone with great potential but needing refinement or development
Usage: The young athlete showed promise, but he was still actinoids in the rough.