1. LecturePLUS Timberlake1 Chapter 2 Atoms and Elements 2.1 Elements and Symbols 2.2 Periodic Table

2. LecturePLUS Timberlake2 Elements Pure substances that cannot be separated into different substances by ordinary processes Are the building blocks of matter 118 elements known today Examples: carbon gold calcium

3. LecturePLUS Timberlake3 Symbols of Elements Use 1 or 2 letter abbreviations Capitalize the first letter only Examples: C carbon Cocobalt N nitrogenCacalcium F fluorine Br bromine O oxygen Mg magnesium

4. LecturePLUS Timberlake4 Symbols from Latin Names ElementSymbolLatin name CopperCucuprum GoldAuaurum LeadPbplumbum MercuryHghydrargyrum PotassiumKkalium SilverAgargentum SodiumNanatrium TinSnstannum

5. LecturePLUS Timberlake5 % Major Elements in the Body O65.0 %K 0.34 C18.0S 0.26 H10.0Na 0.14 N 3.0Cl 0.14 Ca 1.4Fe 0.004 P 1.0 Zn 0.003 Mg 0.50 Trace Elements As, Cr, Co, Cu, F, I, Mn, Mo, Ni, Se, Si, V

6. LecturePLUS Timberlake6 Learning Check Select the correct symbol for each: A. Calcium 1) C2) Ca3) CA B. Sulfur 1) S2) Sl3) Su C. Iron 1) Ir2) FE3) Fe

7. LecturePLUS Timberlake7 Solution Select the correct symbol for each: A. Calcium 2) Ca B. Sulfur 1) S C. Iron 3) Fe

8. LecturePLUS Timberlake8 Learning Check Select the correct name for each: A. N 1) neon2) nitrogen 3) nickel B. P 1) potassium2) phogiston 3) phosphorus C. Ag 1) silver2) agean3) gold

9. LecturePLUS Timberlake9 Solution Select the correct name for each: A. N 2) nitrogen B. P 3) phosphorus C. Ag 1) silver

10. LecturePLUS Timberlake10 Periodic Table The periodic table is an arrangement of the elements according to similarities in their chemical and physical properties.

11. LecturePLUS Timberlake11 Physical Properties The characteristics of a substance that can be observed without changing the substance. Color Size Shape Density Freezing and Boiling Points Odor

12. LecturePLUS Timberlake12 Groups of Elements Vertical columns on the periodic table Similar physical properties Similar chemical properties

13. LecturePLUS Timberlake13 Groups on the Periodic Table 1 2 3 4 5 6 7 8

14. LecturePLUS Timberlake14 Representative Groups Group 1Alkali Metals Group 2 Alkaline Earth Metals Group 7 Halogens Group 8Noble Gases

15. LecturePLUS Timberlake15 Location of Some Groups 1 2 3 4 5 6 7 8 A l m k e a t l a i l s AlkalineAlkaline HalogensHalogens I G n a e s r e t s

16. LecturePLUS Timberlake16 Periods on the Periodic Table Horizontal rows from Group 1 to Group 8. Numbered 1, 2, 3, ….

17. LecturePLUS Timberlake17 Periods on the Periodic Table 123456123456

18. LecturePLUS Timberlake18 Learning Check A. Element in Group VII, Period 4 1) Br2) Cl3) Mn B. Element in Group II, Period 3 1) beryllium2) magnesium 3) boron

19. LecturePLUS Timberlake19 Solution A. Element in Group VII, period 4 1) Br B. Element in Group II, Period 3 2) magnesium