1, elements and compounds.
Understanding the concepts of elements and compounds is the basis of chemistry learning. Elements are substances composed of atoms of the same type, such as oxygen and metallic iron. Compounds are substances composed of atoms of different elements in a certain proportion, such as water and sodium chloride. Students need to learn chemical symbols, atomic numbers and weights of elements, naming rules of compounds and writing of chemical formulas.
2. Reactions and chemical equations.
Students need to master the basic concepts of chemical reactions, such as reactants, products and types of chemical reactions. A chemical equation is a representation of a chemical reaction, with reactants on the left and products on the right. Students need to be able to balance chemical equations to maintain the conservation of mass. In addition, students also need to understand special types of chemical reactions such as acid-base neutralization reaction and redox reaction.
3. Atomic structure and periodic table.
Students need to master the basic structure of atoms, including the properties and interactions of protons, neutrons and electrons. They also need to know about the nuclear, electronic energy levels and electron configuration, and how to use the atomic number of an element to determine its electron configuration.
Yichang senior high school entrance examination introduction:
1, examination subjects and contents.
Yichang senior high school entrance examination mainly includes Chinese, mathematics and foreign languages. The Chinese exam covers reading comprehension, composition and literary knowledge. Mathematics examination includes knowledge of number and algebra, geometry and triangle, function and image, data and probability.
2. Admission methods and policies.
The admission method of Yichang senior high school entrance examination is mainly based on the comprehensive scores of candidates, and the selection is made according to the school enrollment plan. In the process of admission, comprehensive evaluation and comparison are usually made according to students' wishes and comprehensive performance to determine the final admission result of each student.
3. Educational resources and preparation guidance.
Yichang city pays attention to providing good educational resources and preparation guidance, and provides students with a good learning environment and opportunities. Schools and education departments usually organize mock exams, volunteer consultation meetings and course selection guidance to help students understand the exam requirements, choose their study direction and make preparation plans.
The above resources come from official website.