element 105 vs chemical element

element 105 and chemical element both are nouns.

Word	Noun	Adjective	Verb	Adverb
element 105	Yes	No	No	No
chemical element	Yes	No	No	No

As nouns, chemical element is a hypernym of element 105; that is, chemical element is a word with a broader meaning than element 105:

element 105: a transuranic element with atomic number 105
chemical element: 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

Other hypernyms of element 105 include element.

element 105 (noun)	chemical element (noun)
a transuranic element with atomic number 105	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