Argon and Chemical element

Argon noun - A colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere.

Chemical element and argon are semantically related. In some cases you can use "Chemical element" instead a noun "Argon".

Chemical element noun - Any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter.

Argon and chemical element are semantically related. Sometimes you can replace term "Argon" with "Chemical element", this terms are similar.