what does the na mean after a bank name
National bank In the modern United States, the term national bank has a precise meaning: a banking institution chartered and supervised by the Office of the Comptroller of the Currency ("OCC"), an agency in the U.S. Treasury Department, pursuant to the National Bank Act. Inclusion in the bank's name of the word National, the designation National Association, or its abbreviation N.A. is a required part of the distinguishing legal title of a national bank, as in "Citibank, N.A." Many state banks, by contrast, are chartered by the applicable state government agencies (usually the state's department of banking). The Federal Deposit Insurance Corporation (FDIC) insures deposits at both national and state banks.
Sodium Sodium is a chemical element with symbol Na (from Latin natrium) and atomic number 11. It is a soft, silvery-white, highly reactive metal. Sodium is an alkali metal, being in group 1 of the periodic table, because it has a single electron in its outer shell that it readily donates, creating a positively charged atom—the Na+ cation. Its only stable isotope is 23Na. The free metal does not occur in nature, but must be prepared from compounds. Sodium is the sixth most abundant element in the Earth's crust, and exists in numerous minerals such as feldspars, sodalite and rock salt (NaCl). Many salts of sodium are highly water-soluble: sodium ions have been leached by the action of water from the Earth's minerals over eons, and thus sodium and chlorine are the most common dissolved elements by weight in the oceans.