1. General, Organic, and Biological Chemistry Fourth Edition Karen Timberlake 3.1 Elements and Symbols Chapter 3 Atoms and Elements © 2013 Pearson Education, Inc. Lectures

2. © 2013 Pearson Education, Inc. Chapter 3, Section 1 Elements are pure substances from which all other things are built. gold carbon aluminum 2 Elements

3. © 2013 Pearson Education, Inc. Chapter 3, Section 1 3 Sources of Some Element Names Some elements are named for planets, mythological figures, minerals, colors, scientists, and places.

4. © 2013 Pearson Education, Inc. Chapter 3, Section 1 4 A symbol  represents the name of an element.  consists of 1 or 2 letters.  starts with a capital letter. Examples: 1-Letter Symbols 2-Letter Symbols C carbon Co cobalt N nitrogenCa calcium F fluorine Al aluminum O oxygen Mg magnesium Symbols of Elements

5. © 2013 Pearson Education, Inc. Chapter 3, Section 1 5 Symbols of some common elements: S, sulfur Au, gold Al, aluminum Ag, silver Symbols of Common Elements

6. © 2013 Pearson Education, Inc. Chapter 3, Section 1 6 Select the correct symbol for each of the following: 1. Calcium A. CB. CaC. CA 2. Nitrogen A. NB. NeC. Na 3. Iron A. IrB. FEC. Fe Learning Check

7. © 2013 Pearson Education, Inc. Chapter 3, Section 1 7 Select the correct symbol for each of the following: 1. Calcium B. Ca 2. Nitrogen A. N 3. Iron C. Fe Solution

8. © 2013 Pearson Education, Inc. Chapter 3, Section 1 8 Select the correct name for each symbol. 1. S A. sodium B. sulfur C. selenium 2. P A. potassium B. phlogistonC. phosphorus 3. Ag A. silver B. ageanC. gold Learning Check

9. © 2013 Pearson Education, Inc. Chapter 3, Section 1 9 Select the correct name for each symbol. 1. SB. sulfur 2. PC. phosphorus 3. AgA. silver Solution