现行中学化学内容中有相当大一部分是关于元素及化合物性质的描述，其中有关非金属氢化物的酸碱性是十分重要的一种化学性质。我们认为，对元素及其化合物的性质描述，首先应根据实验事实，通过对比、归纳，总结出按周期律的递变规律，同时也应该根据基本理论作一些理性解... A considerable part of the chemical content of the current middle school is about the description of the nature of the elements and compounds, of which the acidity and alkalinity of non-metal hydrides is a very important chemical property. We believe that the description of the nature of the elements and their compounds should first be based on experimental facts, through comparison, induction, summed up the law of gradual changes in the law of the cycle, but also should make some rational solutions based on the basic theory...