The symbol for sodium is "Na," from the Latin word "natrium." Its atomic number is 11, and its atomic mass is 22.98977.
Sodium is considered an alkali metal. It is silvery white in appearance and is found as a salt in salt mines and sea water. Sodium was first isolated by Sir Humphrey David in 1807. Until then, there was no distinction between sodium and potassium. Potassium is a vegetable alkali, and sodium is a mineral alkali.Learn more about Chemistry