ATOMIC NUMBER 57
(noun)Did you mean?
Definitions
Example Sentences
"Lanthanum is a chemical element with atomic number 57."
"The atomic number 57 indicates that a neutral lanthanum atom has 57 electrons."
"Elements with atomic number 57 are often used in the production of high-tech devices."
"The atomic number 57 corresponds to the lanthanum symbol La."
"Lanthanum was discovered by Carl Gustav Mosander in 1839 and assigned atomic number 57."
