element 109 vs atomic number 109

element 109 and atomic number 109 both are nouns.

Word	Noun	Adjective	Verb	Adverb
element 109	Yes	No	No	No
atomic number 109	Yes	No	No	No

As nouns, element 109 and atomic number 109 are synonyms defined as:

element 109 and atomic number 109: a radioactive transuranic element, with atomic number 109

Other synonyms of element 109 include meitnerium, Mt.

element 109 (noun)	atomic number 109 (noun)
a radioactive transuranic element, with atomic number 109	a radioactive transuranic element, with atomic number 109