Name: sodium
Symbol: Na
Atomic number: 11
Atomic weight: 22.989770 (2)
Group in periodic table: 1
Group name: Alkaline metal
Period in periodic table: 3
Block in periodic table: s-block
CAS registry ID: 7440-23-5
Soap is generally a sodium salt of fatty acids. The importance of common salt to animal nutrition has been recognized since prehistoric times. The most common compound is sodium chloride, (table salt).