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Unformatted text preview: Chapter 4 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. Why is it important to understand atoms? a. understanding atoms is the key to advancing technologies and improving the quality of life, it allows chemical advancement. b. the atom is the basic building block of all matter; by understanding the atom we gain important insights into the properties of all matter. 2. What is an atom? a. I t is the smallest particle that any piece of matter can be broken into that still maintains the chemical properties of that matter 3. What did Democritus contribute to our modern understanding of matter? a. He was the first person to suggest that an atom existed. His theory of its composition has been proven wrong, but its existence is backed by hundreds of years of research b. Democritus reasoned that matter was made of small, indivisible, indestructible particles. 4. What are three main ideas of Dalton’s atomic theory? a. Atoms are small, indivisible particles, all atoms of an element have the same mass, atoms combine in whole-number ratios to form compounds 5. Describe rutherford’s gold experiment and the results of the experiment. How did these results contradict the plum pudding model of the atom?...
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This note was uploaded on 07/02/2008 for the course 004 007 taught by Professor Haverhals during the Summer '08 term at University of Iowa.
- Summer '08