2. Welcome of Chemistry Welcome of Chemistry Full Report on Liquid Lab Density Due! Full Report on Liquid Lab Density Due! Questions Questions Slope for Solid Density Lab? Slope for Solid Density Lab? Bonus Points for Solid Density Lab Bonus Points for Solid Density Lab Element profiling Book Project Element profiling Book Project 18 Elements Quiz 18 Elements Quiz Finish notes on Math Skills Finish notes on Math Skills Notes on Matter and Its Property Notes on Matter and Its Property Create a graphic organizer Create a graphic organizer Practice problems Practice problems

3. Warm-Up What is Matter? What is Matter?

4. 18 Elements Quiz 1. He = _________ 2. Si = _________ 3. F = __________ 4. Be = _________ 5. Mg = _________ 6. Lithium = _________ 7. Sodium = ___________ 8. Chlorine = __________ 9. Atomic #1 = ________ 10. Atomic #4 = ________

5. Ch. 1: Matter and Change 1.2 Matter and Its Properties

6. Terms Matter- anything that has mass and volume Matter- anything that has mass and volume Atom- smallest unit of an element that keeps the properties of element Atom- smallest unit of an element that keeps the properties of element Element- pure substance made of only one type of atom Element- pure substance made of only one type of atom Compound- substance made of 2 or more types of atoms that are chemically bonded Compound- substance made of 2 or more types of atoms that are chemically bonded Molecule- type of compound in which bonds are covalent bonds Molecule- type of compound in which bonds are covalent bonds

7. Properties of Matter chemists use characteristic properties to tell substances apart and to separate them chemists use characteristic properties to tell substances apart and to separate them some properties define a group of substances some properties define a group of substances

8. Types of Properties Extensive- depend on the amount of matter Extensive- depend on the amount of matter Ex: volume, mass, amount of energy Ex: volume, mass, amount of energy Intensive- do not depend on the amount Intensive- do not depend on the amount Ex: density, boiling point, ability to conduct Ex: density, boiling point, ability to conduct

9. Types of Properties Physical- characteristics that can be observed or measured without changing the identity of a substance Physical- characteristics that can be observed or measured without changing the identity of a substance Chemical- relates to a substances ability to undergo changes that transform it into a different substance Chemical- relates to a substances ability to undergo changes that transform it into a different substance Easiest to see when a chemical is reacting Easiest to see when a chemical is reacting

10. Physical Changes in Matter change in a substance that doesn’t change the identity of the substance change in a substance that doesn’t change the identity of the substance Ex. grinding, cutting, melting, boiling Ex. grinding, cutting, melting, boiling Includes all changes of state (physical changes of a substance from one state to another) Includes all changes of state (physical changes of a substance from one state to another)

11. Solids Molecular motion? Molecular motion? Shape and volume? Shape and volume? States of Matter

12. Liquids Molecular motion? Molecular motion? Shape and volume? Shape and volume?

13. Gases Molecular motion and spacing? Molecular motion and spacing? Shape and volume? Shape and volume?

14. Plasma Temporary, high-energy state of molecules Temporary, high-energy state of molecules Exists on the sun, in neon lights, and lightning Exists on the sun, in neon lights, and lightning http://www.thestormsho p.com/clips.htm

15. How does temperature affect the state of a substance? What is temperature?

16. solid liquid solid liquid Different substances have different melting points. Melting Does size affect melting point?

17. liquid solid A substance freezes and melts at the same temperature. Freezing

18. liquid gas Different substances have different boiling points. Boiling

19. gas liquid Condensation and boiling occur at the same temperature. Condensation Why does your glass get “sweaty”?

20. directly from solid gas Can you think of something that sublimes? Sublimation Deposition directly from gas solid Water vapor in the freezer becomes frost

21. Changes of State

22. Gas 0 MixLiquid Heat Mixture Solid Boiling/condensing point Water & Steam Water State Change Diagram for Water Ice & Water Ice intermolecular forces weakened intermolecular forces dominate T e m p e r a t u r e (K) 473 373 273 Steam Melting/ freezing point

23. Chemical Changes in Matter a change in which a substance is converted into a different substance a change in which a substance is converted into a different substance same as chemical reaction same as chemical reaction doesn’t change the amount of matter present doesn’t change the amount of matter present reactants- substances that react reactants- substances that react products- substances that are produced products- substances that are produced

24. mercury + iodine  mercuric iodide

25. Energy Changes in Matter when any change occurs, energy is always involved when any change occurs, energy is always involved energy can be in different forms (light, heat, etc.) energy can be in different forms (light, heat, etc.) energy is never destroyed or created (law of conservation of energy) energy is never destroyed or created (law of conservation of energy)

26. Energy Changes in Matter Exothermic Reaction- reaction that gives off energy (feels warm on outside) Exothermic Reaction- reaction that gives off energy (feels warm on outside) Endothermic Reaction- reaction that uses up energy (feels cold on outside) Endothermic Reaction- reaction that uses up energy (feels cold on outside)