单质和化合物-Elements-and-Compoundsppt课件

,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,Elements and Compounds,Elements and Compounds,Objectives,Distinguish between elements,单质,and compounds,化合物,.,Describe the organization of,elements in the,periodic table,元素周期表,.,Explain the laws of definite,定比定律,and multiple proportions,倍比定律,element:,单质,元素,Objectiveselement:单质,元素,Choose the mixture as homogeneous.,a.brass(an alloy of zinc and copper),b.muddy water,c.blood,d.powdered drink mix dissolved in water,Exercises:,Choose the mixture as homogen,Classification:,?,?,solution,Classification:?solution,Can you see individual hydrogen and oxygen,in the water?,What is element and compound?,Can you see individual hydroge,Ur,Br,2,Cu,UrBr2Cu,An element is a pure substance that,cannot be separated into simpler substances by physical or chemical,means.,Element,单质,Group discussion:Can you give some elements as many as you can?(In English),An element is a pure substance,Cu,Hg,He,/consisting of a single type of,atom,CuHgHe/consisting of a single,Periodic Table,Who was the first to invent the modern periodic table?,Mendeleev,Periodic TableWho was the firs,based on the similarities and masses of the elements,period,周期,group,族,based on the similarities and,Compound,化合物,What,s the similarities between water and carbon dioxide CO,2,?,?,Consist of two kinds of elements,Pure substance,consist of oxygen,made up of two or more different elements that are combined chemically,Compound 化合物Whats the similar,How can you prove salt is made up of two elements?Can you taste 3 things?,Na,Cl,2,How can you prove salt is made,How can you prove water is made up of two elements?The experiment?,An electric current breaks down water into its components,oxygen and hydrogen.,electrolysis,电解,How can you prove water is mad,Summarize:,Summarize:,Classify the following matters into,（,mixture,、,pure substance,、,element,、,compound,）：,Classify the following matters,Choose the compounds from following substances,(),table salt,water,alcohol,sucrose,sulfuric acid,baking soda,，,carbon dioxide,oxygen,helium,食盐,酒精,蔗糖,Choose the compounds from foll,单质和化合物-Elements-and-Compoundsppt课件,Law of conservation of mass,Mass is neither created nor destroyed during a chemical reaction,it is conserved,保存的,质量守恒定律,What,s the change of iron?If the mass of reactants equal products?,Law of conservation of massMa,mass,reactants,=,mass,products,A 13.0-g sample of X combines with a 34.0-g sample of Y to form the compound XY,2,.What is the mass of the reactants?,Lets try:,反应物,生成物,P 9:50,mass reactants =mass prod,2.If 14.0g of N,2,gas reacts with excess of hydrogen gas,What,s the mass of NH,3,formed?,2.If 14.0g of N2 gas reacts w,History:,Antoine Lavoisier,mercury(II)oxide,History:Antoine Lavoisiermercu,Use the data in the table to answer the following questions.,Use the data in the table to a,选择=结果,汇报结束,谢谢观看,！,欢迎提出您的宝贵意见！,选择=结果汇报结束 谢谢观看！,