Salt is a chemical compound called sodium chloride, with the formula NaCL (Na = sodium, CL = chlorine). Sodium chloride consists of 40% sodium and 60% chlorine. Salt is of low toxicity and is non-flammable. Seen under a microscope, table salt is made up of many cube-shaped crystals.
Salt
exists naturally in seawater. When an area of seawater becomes enclosed it
evaporates under the sun, a deposit is left. Over millions of years other
sediments have been deposited over the salt, leaving beds of halite (rock salt)
below the surface.
