Question

ever iron get rusted,we are using for building constructions as a traditional metal.is it correct if not suggest alternate metals.
collect information about our Indian sage Kannada in explaining the structure of atom and make as a poster.
cut the cardboard into various pieces to explain the chemical formula of the compounds by crisis-cross method

Answer 1

I have an answer for you.
Iron is the metal that gets rust due to reaction with moisture in the atmosphere.The stainless steel is kind of mater that is very less reactive to atmosphere. But due to its high cost it is not used
Kanada proposed that everything can be subdivided, however this subdivision can't go on everlastingly, and there must be littlest elements (parmanu) that can't be separated, that are endless, that total in various approaches to yield complex substances and bodies with interesting character, a procedure that includes warmth, and this is the reason for all material presence. He utilized these thoughts with the idea of Atman (soul, Self) to build up a non-mystical intends to moksha Kanada's thoughts were persuasive on different schools of Hinduism, and over its history turned out to be nearly connected with the Nyaya school of Hindu reasoning.