Up to twelve percent of children have diagnosed or undiagnosed auditory processing disorder, a condition that inhibits the brainâs ability to translate and process sounds.
Magnesium is sometimes used in flares and flashbulbs because it  burns with a bright white light.
Several of the metal salts that produce colors contain chlorine. Copper - Copper compounds produce blue colors in fireworks. Iron - Iron is used to produce sparks. The heat of the metal determines the color of the sparks. Lithium - Lithium is a metal that is used to impart a red color to fireworks. Lithium carbonate, in particular, is a common colorant.