There are 115 elements known till today. Some of them are metals and some are non-metals. Metals are usually hard, malleable and ductile and have metallic lustre. Non-metals are usually soft, do not posses lustre and are not malleable and ductile. But iodine is a non-metal which has metallic lustre. Iodine is also important for us. Non-metals are bad conductors of heat and electricity. (i) Why iodine is important for us ? (ii) Name a non-metal which is good conductor of heat and electricity. (iii) As a student, what initiative you will take to comment on the statement that "Iodised salt is good for health". Give any two suggestions.

There are 115 elements known till today. Some of them are metals and s

1.	There are 115 elements known till today. Some of them are metals and some are non-metals. Metals are usually hard, malleable and ductile and have metallic lustre. Non-metals are usually soft, do not posses lustre and are not malleable and ductile. But iodine is a non-metal which has metallic lustre. Iodine is also important for us. Non-metals are bad conductors of heat and electricity. (i) Why iodine is important for us ? (ii) Name a non-metal which is good conductor of heat and electricity. (iii) As a student, what initiative you will take to comment on the statement that "Iodised salt is good for health". Give any two suggestions.
Answer» Solution :(i) Deficiency of iodine leads to goitre. It ALSO leads to hypothyroidism, a most COMMON disease among ladies above 40 years of AGE. (ii) Graphite is a non-metal which is a good conductor of heat and electricity. (iii) Suggestions : a) To start an awareness campaign in localities, HOMES and SCHOOLS. (b) To make understand the importance of iodine to people.