Chapter 5 exercises

Chapter 5 exercises - Chapter 5 exercises The book gives...

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Chapter 5 exercises The book gives answers to odd problems only. Because of the large number of problems, only the question section is shown. My answers to every question are represented with a. and the book’s is represented with b. 1. Do the properties of an element change when it combines with another element to form a compound? Explain. a. Yes. For example Na and Cl are both extremely topic as pure elements. Na is very metallic in nature and Cl is a gas, but when combined to form NaCl they become table salt. b. The properties of an element completely change when it combines with another element to form a compound. For example, water is made out of the elements hydrogen and oxygen, both of which are gases. When hydrogen and oxygen combine to form water, their properties change and they become a new liquid substance. 2. How would the world be different if elements did not combine to form compounds? a. Life could not exist. No element contains the properties of life, they are too simple. 3. What is the law of constant composition. Who discovered it? a. Constant composition says that Water (H 2 O) for example, no matter what sample you take, will always have two hydrogen and 1 oxygen atom in every molecule. b.
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Chapter 5 exercises - Chapter 5 exercises The book gives...

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