“鋁和它的化合物”这一章是在碱金屬、碱土金屬之後提出來的。鋁在週期表中位於第三週期,学生們对本週期的其他元素已有了初步的知識。尤其在鈉、鈣等元素学習了以後,有必要通过鋁的学習使他們形成元素週期性遞变的完整概念。此外,在高中化学裹,只提出鉀、钠、鈣、鋁,鈇等金屬來个別的研究,鉀、鈉是作 The chapter “Aluminum and its compounds” is proposed after alkali and alkaline earth metals. Aluminum is in the third cycle of the periodic table and students have had initial knowledge of the other elements of the cycle. Especially after the study of elements such as sodium and calcium, it is necessary to make them form the complete concept of cyclical changes of elements through the study of aluminum. In addition, in the high school chemical package, only to potassium, sodium, calcium, aluminum, aluminum and other metals to individual research, potassium, sodium is