Textbook,Chapter1:7,10,12,23,31,32,54,61,69,89 Chapter 2.Atoms and the Atomic Theory 1.教学目标 Understand the structure of atoms Understand the general properties ofatoms Get a genera idea about the periodic table Understand the meaning of molar mass 2.教学重难点 教学重点： The historical path leading to identification of atom ic structure Mass number,atomic number,neutron number,and atomic mass of an atom Trends in periods and groups Definition of mole and Avogadro's number 教学难点 Experiments leading to discovery of electrons and nucleus Converting between mass,number of moles,and number of atoms 3.教学内容 2-1 Early Chemical Discoveries and the Atomic Theory Law of conservation of matter Law of constant composition John Dalton's atomic theory Law of multiple proportions 2-2 Electrons and Other Discoveries in Atomic Physics Thomson's cathode-ray experiment and Thomson's model of the atom Millikan's oil drop experiment and determination of the charge and mass of the electron 2-3 The Nuclear Atom Rutherford's gold foil experiment and Rutherford's model of the atom Discovery of protons Discovery of neutrons• Textbook, Chapter 1: 7, 10, 12, 23, 31, 32, 54, 61, 69, 89 Chapter 2. Atoms and the Atomic Theory 1. 教学目标 • Understand the structure of atoms • Understand the general properties of atoms • Get a genera idea about the periodic table • Understand the meaning of molar mass 2. 教学重难点 教学重点: • The historical path leading to identification of atomic structure • Mass number, atomic number, neutron number, and atomic mass of an atom • Trends in periods and groups • Definition of mole and Avogadro’s number 教学难点: • Experiments leading to discovery of electrons and nucleus • Converting between mass, number of moles, and number of atoms 3. 教学内容 2-1 Early Chemical Discoveries and the Atomic Theory Law of conservation of matter Law of constant composition John Dalton’s atomic theory Law of multiple proportions 2-2 Electrons and Other Discoveries in Atomic Physics Thomson’s cathode-ray experiment and Thomson’s model of the atom Millikan’s oil drop experiment and determination of the charge and mass of the electron 2-3 The Nuclear Atom Rutherford’s gold foil experiment and Rutherford’s model of the atom Discovery of protons Discovery of neutrons