atomic number 78 vs Pt

atomic number 78 and Pt both are nouns.

Word	Noun	Adjective	Verb	Adverb
atomic number 78	Yes	No	No	No
Pt	Yes	No	No	No

As nouns, atomic number 78 and Pt are synonyms defined as:

atomic number 78 and Pt: a heavy precious metallic element; grey-white and resistant to corroding; occurs in some nickel and copper ores and is also found native in some deposits

Other synonyms of atomic number 78 include platinum.

atomic number 78 (noun)	Pt (noun)
a heavy precious metallic element; grey-white and resistant to corroding; occurs in some nickel and copper ores and is also found native in some deposits	a heavy precious metallic element; grey-white and resistant to corroding; occurs in some nickel and copper ores and is also found native in some deposits