This mixture is sold as superphosphate . Teflon Teflon,a trademark for a waxy, opague material. It is used as a coating on cooking utensils and in industrial applications to prevent sticking. The junction develops a measurable electric potential which varies with change of temperature. Fluoroapatite is less soluble in mouth acids, hence fluoride-containing teeth are less susceptible to decay.
Many communities recommend a fluoride supplement for growing children.
About half the population of the U.S. and Canada drinks artificially fluoridated water. Sodium fluoride is added to public water supplies in carefully regulated, nontoxic amounts. It should be told that too much fluoride is also harmful. It discolours teeth and it accumulates in the bones, causing pain and possible crippling. Transferium elements Elements which have atomic numbers greater than 100.