atomic number 49 vs In

atomic number 49 and In both are nouns.

Word	Noun	Adjective	Verb	Adverb
atomic number 49	Yes	No	No	No
In	Yes	No	No	No

As nouns, atomic number 49 and In are synonyms defined as:

atomic number 49 and In: a rare soft silvery metallic element; occurs in small quantities in sphalerite

Other synonyms of atomic number 49 include indium.

atomic number 49 (noun)	In (noun)
a rare soft silvery metallic element; occurs in small quantities in sphalerite	a rare soft silvery metallic element; occurs in small quantities in sphalerite