55.4 MB (20.7 MB compressed)
5438 x 3564 pixels
46.0 x 30.2 cm ⏐ 18.1 x 11.9 in (300dpi)
ER DEGGINGER / SCIENCE PHOTO LIBRARY ER DEGGINGER / SCIENCE PHOTO LIBRARY
Sodium chloride crystals. Better known as salt, this ionic compound (NaCl) consists of ions of sodium (Na) and chlorine (Cl). As it is an ionic compound, it can dissolve in polar solvents (such as water) to form a solution. The solid crystals can be reformed by evaporation. It is obtained from sea water and underground deposits. It is an essential part of the diet, sodium and chloride ions being vital for body biochemistry, reflecting life's origin in the sea. NaCl is an industrial source of sodium and chlorine.
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