1. Introductory Chemistry: Concepts & Connections Introductory Chemistry: Concepts & Connections 4 th Edition by Charles H. Corwin Introduction to Chemistry Christopher G. Hamaker, Illinois State University, Normal IL © 2005, Prentice Hall Chapter 1

2. What is the definition of chemistry? Study of all substances and the changes they undergo. Chapter 12

3. Why chemistry called the central science? Chapter 13

4. 4 Chemistry: The Central Science Most other sciences demand an understanding of basic chemical principles, and Chemistry is often referred to as the Central Science

5. Chapter 15 Evolution of Chemistry The Greeks believed in four basic elements, Earth, Air, Fire, and Water All substances were combinations of these four basic elements

6. Chapter 16 Scientific Investigations Science is the methodical exploration of nature followed by a logical explanation of the observations. Scientific investigation entails: –planning an investigation –carefully recording observations –gathering data –analyzing the results

7. Chapter 17 The Scientific Method The scientific method is a systematic investigation of nature and requires proposing an explanation for the results of an experiment in the form of a general principle. The initial, tentative proposal of a scientific principle is called a hypothesis. After further investigation, the original hypothesis may be rejected, revised, or elevated to the status of a scientific principle.

8. Scientific Method the careful noting and recording of natural phenomena a test of a hypothesis or theory a tentative explanation of a single or small number of natural phenomena a general explanation of natural phenomena a generally observed natural phenomenon

9. Chapter 19 Conclusions Continued After sufficient evidence, a hypothesis becomes a scientific theory. A natural law is a measurable relationship.

10. Chapter 110 Modern Chemistry Chemistry is a science that studies the composition of matter and its properties. Chemistry is divided into several branches: –Organic chemistry is the study of substances containing carbon –Inorganic chemistry is the study of all other substances that don’t contain carbon –Biochemistry is the study of substances derived from plants and animals –Analytical is the study of matter and ways to study the properties of matter. –Physical is the physics of chemistry. Thermodynamics and quantum mechanics.

11. Chapter 111 Learning Chemistry Different people learn chemistry differently. What do you see in the picture? Some people see a vase on a dark background, some people see two faces.

12. Chapter 112 Problem Solving Connect the 9 dots using only four straight lines. Experiment until you find a solution. However, we have used 5 straight lines. No matter which dot we start with, we still need 5 lines.

13. Chapter 113 Problem Solving Are we confining the problem? We need to go beyond the 9 dots to answer the problem.

14. Chapter 114 Conclusions Scientists use the scientific method to investigate the world around them. Experiments lead to a hypothesis, which may lead to a scientific theory or a natural law. Chemistry is a central science with many branches. The impact of chemistry is felt in many aspects of our daily lives.

15. QUIZ - CHAPTER -1 1.What is the difference between a hypothesis and theory 2.According to the ancient Greeks, which of the following are not basic elements found in nature: I.Air II.Coal III.Fire IV.Earth V.Gold VI.Water Chapter 115