atomic number 70 vs ytterbium

atomic number 70 and ytterbium both are nouns.

Word	Noun	Adjective	Verb	Adverb
atomic number 70	Yes	No	No	No
ytterbium	Yes	No	No	No

As nouns, atomic number 70 and ytterbium are synonyms defined as:

atomic number 70 and ytterbium: a soft silvery metallic element; a rare earth of the lanthanide series; it occurs in gadolinite and monazite and xenotime

Other synonyms of atomic number 70 include Yb.

atomic number 70 (noun)	ytterbium (noun)
a soft silvery metallic element; a rare earth of the lanthanide series; it occurs in gadolinite and monazite and xenotime	a soft silvery metallic element; a rare earth of the lanthanide series; it occurs in gadolinite and monazite and xenotime