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2013年全国高考物理第35题内容出自选修3-5部分,本题分为两小题。从提供的学生答卷来看,两题均出现了不同方式的解答错误,现分析如下,以便广大考生在今后的考试中避免同类错误的发生。【第一小题分析】本小题内容为原子物理部分知识,涉及考纲中的两个知识点:1.原子核的组成(I)。自然需要掌握原子核是由质子和中子组成;原子核的符号表示方式;电荷数、质量数及中子数的计算。2.核反应方程(I)。重要的是掌握核反应方程的规律:电荷数和质量数守恒。明确了基本知识,本题的计算步骤也就顺
2013 National Physics Entrance Exam 35 questions from the elective part 3-5, the question is divided into two questions. Judging from the students’ answers provided, there are different ways of answering mistakes on the two questions. The analysis is as follows, so that the majority of candidates can avoid similar mistakes in future examinations. [The first analysis] The contents of this quest for the atomic physics part of the knowledge related to the two knowledge points in the syllabus: 1. The composition of the nucleus (I). Natural need to master the nucleus is composed of protons and neutrons; nuclear symbolic representation; charge number, mass number and neutron number calculation. 2. Nuclear Reaction Equation (I). It is important to grasp the law of nuclear reaction equations: conservation of charge and mass. Clear basic knowledge, the calculation steps of this problem will be smooth