Radical 46

Radical 46 or radical mountain meaning "mountain" is one of the 31 Kangxi radicals composed of three strokes. It is found in the names of mountains generally in east Asia.
In the Kangxi Dictionary, there are 636 characters to be found under this radical.
山 is also the 39th indexing component in the Table of [Indexing Chinese Character Components] predominantly adopted by Simplified Chinese dictionaries published in mainland China.
In Taoist cosmology, 山 is the nature component of the bagua diagram gèn. This diagram corresponds to the I Ching trigram ☶.

Evolution

The radical is also used as an independent Chinese character. It is one of the kyōiku kanji or kanji taught in elementary school in Japan. It is a first grade kanji.