strontium vs atomic number 38

strontium and atomic number 38 both are nouns.

Word	Noun	Adjective	Verb	Adverb
strontium	Yes	No	No	No
atomic number 38	Yes	No	No	No

As nouns, strontium and atomic number 38 are synonyms defined as:

strontium and atomic number 38: a soft silver-white or yellowish metallic element of the alkali metal group; turns yellow in air; occurs in celestite and strontianite

Other synonyms of strontium include Sr.

strontium (noun)	atomic number 38 (noun)
a soft silver-white or yellowish metallic element of the alkali metal group; turns yellow in air; occurs in celestite and strontianite	a soft silver-white or yellowish metallic element of the alkali metal group; turns yellow in air; occurs in celestite and strontianite