1. Chapter 4 Lecture Basic Chemistry Fourth Edition Chapter 4 Atoms and Elements 4.1 Elements and Symbols Learning Goal Given the name of an element, write its correct symbol; from the symbol, write the correct name. © 2014 Pearson Education, Inc.

2. Key Math Skills Using Positive and Negative Numbers in Calculations (1.4B) Calculating a Percentage (1.4C) Core Chemistry Skills Counting Significant Figures (2.3) Rounding Off (2.4) Using Significant Figures in Calculations (2.4) © 2014 Pearson Education, Inc. Chapter 4 Readiness

3. © 2014 Pearson Education, Inc. Elements are pure substances from which everything else is built. Over the centuries, elements have been named for planets mythological figures minerals geographic locations famous people Elements

4. © 2014 Pearson Education, Inc. Sources of Element Names

5. © 2014 Pearson Education, Inc. Chemical Symbols are one or two letter abbreviations for an element’s name. When chemical symbols contain two letters, the second letter is NOT capitalized. Co is the chemical symbol for cobalt. CO specifies there are two elements present, carbon and oxygen. Chemical Symbols

6. © 2014 Pearson Education, Inc. The chemical symbol for carbon is C. Carbon atoms can arrange themselves in different ways to make different substances. Graphite contains carbon atoms connected to each other in planes of hexagonal rings. We use graphite for lubricants and in pencils. Chemistry Link to Industry

7. © 2014 Pearson Education, Inc. Carbon atoms are also arranged in a rigid structure forming diamonds. Diamonds are transparent and much harder than graphite. Chemistry Link to Industry

8. © 2014 Pearson Education, Inc. Aluminum, AlSilver, Ag Gold, Au Sulfur, S Names and Symbols of Elements

9. © 2014 Pearson Education, Inc. Learning the names and symbols for elements will greatly help your learning of chemistry. Names and Symbols of Elements Name of Element Element Symbol Name of Element Element Symbol AluminumAlHydrogenH BariumBaIodineI CarbonCNitrogenN CalciumCaOxygenO ChlorineClPhosphorusP

10. © 2014 Pearson Education, Inc. Select the correct symbol for each element: A. Calcium(1) C(2) Ca(3) CA B. sulfur (1) S(2) Sl(3) Su C. iron(1) Ir(2) FE(3) Fe D. sodium(1) S(2) So(3) Na E. magnesium(1) Mg(2) Mn(3) Ma Learning Check

11. © 2014 Pearson Education, Inc. Select the correct symbol for each element: A. calcium (2) Ca B. sulfur (1) S C. iron(3) Fe D. sodium(3) Na E. magnesium(1) Mg Solution

12. © 2014 Pearson Education, Inc. Select the correct element name for each symbol: A. N(1) neon (2) nitrogen B. P(1) potassium(2) phosphorus C. Ag(1) silver(2) gold D. K(1) krypton(2) potassium E. F(1) fluorine(2) fempto Learning Check

13. © 2014 Pearson Education, Inc. Select the correct element name for each symbol: A. N(2) nitrogen B. P(2) phosphorus C. Ag(1) silver D. K(2) potassium E. F(1) fluorine Solution