With popular words and vivid graphics as its feature, each book of this series presents one or several themes. Starting from the interesting phenomenon in daily life, it guides and cultivates the readers interest in learning, broadens the vision of readers, and helps readers to learn English vocabulary and practice English reading. This series covers physics, chemistry, biology as well as technology and invention. It is suitable for science lovers interested in scientific knowledge to read. This book is one of the chemistry series. The chemistry series mainly explains the basic concepts of modern chemistry, covering chemical reaction, organic chemistry, biochemistry, metal, nonmetal, molecule, atom, states of matter and other aspects. Your zipper on your clothes, your keys and your table wares are all made of metal. Why are they in various forms? This book will explain the history and characteristics of the periodic table of elements. After the overview of common gender of metals, it will make the introduction in accordance with its sort in the periodic table of elements. The book contains the column of ""scientific vocabulary"", which covers the key knowledge of vocabulary in each chapter. At the same time, in the column of ""Have a Try"", there are rich and interesting small family experiments which can help improve readers practical ability.
