元素推断题集物质结构初步知识、化学用语、元素及其化合物知识于一体,覆盖面大,综合性强,要想快速而又准确地解答此类题目,就必须在以下四个方面多下功夫,以把握住解答题目的突破口。一、熟记元素排列顺序初中阶段要求同学们推断的元素,其核电荷数都在20以内。其中,氢、氧、钠、镁、硫、氯、氩等则是重点推断对象。采用分段记忆法把1-20号元素 Elemental inference sets the initial knowledge of the material structure, chemical terms, elements and their compound knowledge into one, covering a large area, comprehensive and strong, in order to quickly and accurately answer such questions, we must make more efforts in the following four aspects, Take a break through the solution to the problem. First, to remember the order of elements in the junior high school students infer elements, their nuclear charge is less than 20. Among them, hydrogen, oxygen, sodium, magnesium, sulfur, chlorine, and argon are the main targets of inference. Using Segmented Memory Method to Place Elements 1-20