The unique property of iron that would be best to separate iron filings from salt crystals is its magnetic property. Since iron is attracted to a magnet, you can use a magnet to quickly and effectively draw the iron filings away from the salt, leaving the salt behind. This method is efficient and takes advantage of the magnetic attraction of iron.
Iron is the most common element forming the planet Earth and can be found in Earth's outer and inner core. It is the fourth most common element in the Earth's crust as well. Fresh iron surfaces appear silver-gray, but rusts easily in normal air. It is a solid at room temperature, but it is a soft metal. It is malleable and used for many tools and utensils. Iron is attracted to a magnet and can be magnetized. The melting point of iron is 2800oF.
Iron filings were mixed together with salt crystals. What unique property of iron would be BEST to separate the filings from the salt?
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