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Sodium is an essential mineral for the human body. The most common form of sodium is table salt (sodium chloride). As an added ingredient to most foods - used for curing meat, masking off-flavors, retaining moisture, and enhancing flavors - sodium is typically over-consumed in very high amounts in modern society.
Sodium is an alkali metal located in the first group or column of the periodic table. The sodium atom has 11 electrons and 11 protons with one valence electron in the outer shell. Characteristics and Properties. Sodium in its pure form is very reactive. It is a very soft metal that can be easily cut with a knife. It is silvery-white in color and burns with a yellow flame.