Definitions
Example Sentences
"Ytterbium has an atomic number 69."
"The atomic number 69 represents the number of protons in the nucleus of a ytterbium atom."
"Ytterbium is a chemical element with the symbol Yb and atomic number 69."
"The atomic number 69 is considered a rare earth element."
"The electronic configuration of an ytterbium atom with atomic number 69 is [Xe] 4f14 6s2."
