《大学化学 Chemistry》课程PPT教学课件（英文）Chapter 3 Discovering the atom and subatomic particles（History of modern chemistry）

《大学化学 Chemistry》课程PPT教学课件（英文）Chapter 1：Chemistry is a Science of Change Chapter 2 Elements of Chemistry

Chapter 1 Chemistry is a Science of Change water molecule is consisted of one oxygen(氧) atom and two hydrogen(氢) atoms A cup of water contains about 1024 water molecules

3.1 Chemistry developed out of interest in materials The ability to control fire allowed ancient people to prepare copper(7000 years ago) and iron (3200 years ago) for tools and weapons

6. 1 An atomic model is needed to understand how atoms bond Electrons in the outermost occupied shell of any atom are responsible for the atom's chemical properties. The electrons that participate in chemical bonding are called valence electrons(价电子), the shell they

Chemical reactions happen in nature to produce natural substance, and even living organism. Chemical reactions have been used by us to produce millions of substance that do not exist in nature. Chemical reactions are the central part of the chemical sciences

Acid-base reaction: Transfer of proton Oxidation and reduction: transfer of electron

10.1 Acids donate protons, bases accept them Sulfuric acid is the number one manufactured chemical 85 billion pounds (40,000,000tons) annually in US. Acid has “sour taste

18.1 Paper is made of cellulose fibers Paper was first made HARDWOOD FIBERS in China as early as AD 100, of mulberry bark, and then introduced to Western world by Arabs in eighth century. The first paper mills were built in spain in 11th century

The medicinal use of plants has been discovered more than 2000 years ago. Greek physician Dioscorides described the use of opium, in which morphine is the main component. In 1806, morphine was isolated from opium. In 1820, quinine was isolated from the bark of the cinchona tree