如果有人告诉你,铁会在空气中自动燃烧起来,你一定不会相信。在现实生活中,人们即使将铁钉、铁丝烧得发红,它们也不会燃烧起来。可是,如果把粉末状的还原铁粉撒在酒精灯的火焰上,这些铁粉就会燃烧起来,在光线较暗的室内,可以见到灯焰周围形成许多明亮的火星。不仅如此,化学家们还能用化学方法制得一种颗粒更细小的乌黑色铁粉,平时放在密封性好的容器内,如果将它们撒到空气中立即就会自 If someone tells you that the iron will burn in the air, you will not believe it. In real life, people will not burn even when nails and wire are burned red. However, if powdered reduced iron powder is sprinkled on the flames of the alcohol lamp, the iron powder will burn. In brightly lit rooms, many bright sparks can be seen around the lamp flame. Not only that, chemists can also use chemical methods to produce a smaller black iron powder particles, usually placed in airtight containers, if they will be sprinkled into the air will be from