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A halide is a binary compound, of which one part is a halogen atom and the other part is an element or radical that is less electronegative than the halogen. Most salts are halides. All Group I Earth metals form halides with the halogens and they are white solids. Metal halides are used in high-intensity discharge light bulbs, such as in modern street lights, because they are more energy- efficient than mercury vapour bulbs, and have much better colour renditionA rendition is an interpretation of a musical score or a performance of a musical work. than orangeSee also Orange for other meanings of the word. The colour orange occurs between red and yellow in the visible spectrum at a wavelength of about 620-585 nanometres. It is the same colour as the fruit for which it was named. With natural colouring material high- pressurePressure (symbol: p is a measure of force per unit area. where p is the pressure F is the force A is the area Often F is taken to be the of the magnitude of the mean vector force normal to the surface of area A upon which it exerts; the "surface" not nece sodiumSodium is the chemical element in the periodic table that has the symbol Na Natrium in Latin) and atom number 11. Sodium is a soft, waxy, silvery reactive metal belonging to the alkali metals that is abundant in natural compounds (especially halite). bulbs.
Examples
- sodium chlorideProperties General Name Sodium chloride Chemical formula Na Cl Appearance White or clear solid CAS-number 7647-14-5 Physical Formula weight 58. 4 amu Melting point 1074 K (801 °C) Boiling point 1738 K (1465 °C) Density 2. 2 ×103 kg/ m3 Crystal structure f (NaCl)
- fluorine chloride (FCl)
- potassium iodidePotassium iodide is a white crystalline salt with chemical formula , used in photography. It may also be used to protect the thyroid from radioactive iodine in the event of a dirty bomb or other minor nuclear attack (it cannot protect against other causes (KI)
- lithium chloride (LiCl)
