(2)第二个元素名称以-ide结尾,用希腊(数字)前缀表示原子个数。遇到两个元音, 可以省略一个 (3)实例:Cl2 o dichlorine monoxide, NF3 nitrogen trifluoride N204 dinitrogen tetroxide P4S10 phosphorus decasulfide Traditional names: H20 water CaCO3 marble chalk limestone NH a(OH)2 slaked NaHCO: bal Nacl table salt MgSO4 7H20 epson salt N20 laughing gas CaSO4 2H20 gypsum ick lin Na2 CO3. 10H20 washing soda A Closer Look The Scientific Method operates. However, it experiments to understand nature seems like such ure. but rather that the laws of nature describe ought to us now, but there the behavior of matt before the seventeenth century, when experiments At many stages of our studies we may propose ex- rarely used. The ancient Greeks, for example, did not rely planations of why nature behaves in a particular way. If a on experiments to test their ideas tive in predicting facts yet to be observed, it is called a the- same problem in exactly the same way, there de- ory or model. A theory is an explanation of the general nes for the practic ence that have n principles of certain phe with considerable evidence s the scientific method. These guidelines in facts to support it. Figure 1.15v. We begin by collecting information, or data, As we proceed through this text, we will rarely have observation and exp t. However, the collection the opportunity to discuss the doubts, conflicts, clashes of of information is not the ultimate goal. The goal is to find personalities, and revolution e a pattern or sense of order in our observations and to un- to our present ideas. We need to be aware that just because derstand the origin of this order. we can spell out the results of science so concisely and mean that scientific progress patterns that lead us to a tentative explanation or hypothe- is smooth, certain, and predictable. Some of the ideas we tually, we may be able to tie together a great number of involved large numbers of scientists. We gain our view of terms of a single statement or equation the natural world by standing on the shoulders of the sci- verbal entists who came before us, Take advantage of this view. atement or a mathematical equation that summarizes a broad As you study, exercise your imagination. Don,'t be afraid to ions and experiences. We tend to think of ask daring questions when they occur to you. You may be the laws of nature as the basic rules under which nature fascinated by what you discover! Find patterns, Formulate and test approach to problems that pattems in the observations, formulating hypotheses to exp nents. Those hypotheses that with ch tests and ful in explaining and predicting behavior become known as5 (2) 第二个元素名称以-ide 结尾，用希腊（数字）前缀表示原子个数。遇到两个元音， 可以省略一个 (3) 实例：Cl2O dichlorine monoxide ， NF3 nitrogen trifluoride， N2O4 dinitrogen tetroxide ， P4S10 tetraphosphorus decasulfide Traditional names： H2O water CaCO3 marble chalk limestone NH3 ammonia Ca(OH)2 slaked lime CO2(s) dry ice NaHCO3 baking soda NaCl table salt MgSO4·7H2O epson salt N2O laughing gas CaSO4·2H2O gypsum CaO quick lime Na2CO3·10H2O washing soda