中学阶段的化学推断题可分成三类:化学元素的推断,无机物的推断,有机物的推断.这类题目涉及知识多,思维容量大,有利于训练和培养学生的逻辑思维、逆向思维和正向思维;横向思维和纵向思维等多种思维能力.其中化学元素的推断是其中最基本的,现通过几例来说 The chemistry inference problems in the middle school stage can be divided into three categories: the inference of chemical elements, the inference of inorganic substances, and the inference of organic substances. These topics involve a lot of knowledge and a large capacity of thinking, which are conducive to training and cultivating students’ logical thinking, reverse thinking and positive direction. Thinking; lateral thinking and longitudinal thinking and many other thinking abilities. Among them, the inference of chemical elements is the most basic.