rhodium vs atomic number 45

rhodium and atomic number 45 both are nouns.

Word	Noun	Adjective	Verb	Adverb
rhodium	Yes	No	No	No
atomic number 45	Yes	No	No	No

As nouns, rhodium and atomic number 45 are synonyms defined as:

rhodium and atomic number 45: a white hard metallic element that is one of the platinum group and is found in platinum ores; used in alloys with platinum

Other synonyms of rhodium include Rh.

rhodium (noun)	atomic number 45 (noun)
a white hard metallic element that is one of the platinum group and is found in platinum ores; used in alloys with platinum	a white hard metallic element that is one of the platinum group and is found in platinum ores; used in alloys with platinum