Sulfur, which has the symbol S on the periodic table is considered a non-metal. It is a bright yellow element, with a distinctive smell(like rotten eggs). If mixed with iron filings, the two can be separated again using a bar magnet wrapped in tissue paper. Iron is a silver-grey solid. It is more dense than sulfur. It is also a magnetic material. The iron will be attracted to the magnet, while the sulfur will remain behind due to the fact that it is non-metallic. These two elements can be heated together in a test tube in a 7:4 iron to sulfur ratio. Once cool, the product formed is iron sulfide.