Activity 10.3

collect information from magazines or from doctors and prepare a note on the importance of consuming iodised salt.

pg.no.120

 Iodized salt  is table salt mixed with a minute amount of various salts of the element iodine. The ingestion of iodide preventsiodine deficiency. Worldwide, iodine deficiency affects about two billion people and is the leading preventable cause of mental retardation. Deficiency also causes thyroid gland problems, including "endemic goitre." In many countries iodine deficiency is a major public health problem that can be cheaply addressed by purposely adding small amounts of iodine to the sodium chloride salt.

Iodine is a micronutrient and dietary mineral that is naturally present in the food supply in some regions, especially near sea coasts, but is generally quite rare in the Earth 's crust, since iodine is a so-called "heavy" element (with the highest atomic mass of any element needed by mammals for life), and abundance of chemical elements generally declines with greater atomic mass. Where natural levels of iodine in the soil are low and the iodine is not taken up by vegetables, iodine added to salt provides the small but essential amount of iodide needed by humans.

Table salt with iodide salt slowly loses its iodine content through the process of oxidation and iodine evaporation.

Collect information for magazine and prepare a note of consuming iodisde and salt