论文部分内容阅读
铁是初中化学中比较系统介绍的一种金属 .学习中 ,应该掌握和了解的知识主要有 :1 铁的物理性质 .纯铁具有银白色的金属光泽 ,质软 ,有良好的延性、展性、导电性和导热性 .铁的密度是 7 86ｇ/ｃｍ3,熔点为 1 535℃ .2 铁化合物 (溶液 )的颜色 .Ｆｅ2 Ｏ3为红棕色 ,Ｆｅ3Ｏ4
Iron is a kind of metal introduced in junior high school chemistry system. The knowledge that should be mastered and understood in learning is mainly as follows: 1 Physical properties of iron. Pure iron has a silvery white metallic luster, which is soft and has good ductility and malleability. , Conductivity and thermal conductivity. The density of iron is 7 86g/cm3, the melting point is 1 535°C .2 The color of the iron compound (solution). Fe2O3 is reddish-brown, Fe3O4