Atomic number 47 is the unique identifier of the chemical element silver, indicating the number of protons in its nucleus. Synonyms for atomic number 47 include Ag, which is derived from the Latin word for silver, and its corresponding atomic symbol. Other synonyms for silver include argentum, which is also derived from Latin, and its abbreviation, Arg. Silver is a lustrous, white, and ductile metal that has a high electrical conductivity and has been used for various purposes throughout history, from currency to jewelry. It is also regularly used in photography, electronics, and medicine.