Definitions
Example Sentences
"The atomic number 39 of yttrium is its distinguishing characteristic."
"Isotopes of atomic number 39 have been studied extensively in nuclear physics."
"The periodic table lists atomic number 39 between zirconium and niobium."
"One interesting property of atomic number 39 is its relatively high melting point."
"The atomic number 39 for yttrium makes it a transition metal."
