一、在空气中点燃铁和铝铁和铝都是化学性质较活泼的金属,能与一些非金属反应,如氧气、氯气等。其中铁和铝在氧气中燃烧是初中化学必做的两个经典实验,铁在氧气中燃烧是火星四射,发出“嚓嚓”的声音,铝在氧气中剧烈燃烧,发出耀眼的白光。这两个实验现象能帮助学生理解铁和铝是化学性质较活泼的金属,同时,实验现象还能使学生产生强烈的视觉刺激,激发学生的兴趣和热情。在做铝在氧气中燃烧的实验时,教师也常因为铝箔在氧气中不易被点燃 First, in the air lit iron and aluminum and aluminum are more chemically active metal, with some non-metallic reaction, such as oxygen, chlorine and so on. Among them, iron and aluminum are burned in oxygen, which are two classic experiments that junior middle school chemistry must do. Iron is burned in oxygen and emits “Cha Cha” sound. Aluminum is burned in oxygen and emits dazzling white light . These two experimental phenomena can help students to understand that iron and aluminum are chemically more active metals. At the same time, experimental phenomena can also give students a strong visual stimulus and stimulate students’ interest and enthusiasm. In experiments where aluminum is burnt in oxygen, teachers often do not easily ignite the foil in oxygen