1. Chapters 1 & 2 Topics: Matter, Physical & Chemical Properties, Measurements, Sig Figs, etc

2.  By the end of this lesson, I can… ◦ Classify something as matter or energy ◦ Identify whether a physical or chemical change has occurred ◦ Classify a symbol as a mixture, atom, molecule, or compound

3.  Chemistry = the study of composition, structure, and properties of substances and the changes that they undergo

4.  Matter= anything that has mass (made of atoms) and takes up space ◦ Resistant to change in motion; has weight  Are ya with me? List 3 examples of matter

5.  Energy = the ability to cause change or to do work  2 types of NRG: ◦ Kinetic = energy of an object in motion ◦ Potential = energy of an object at rest  Are ya with me? List 2 forms of NRG associated with chemistry.

6.  Law of Conservation of Matter = matter can neither be created nor destroyed  Law of Conservation of Energy = energy can neither be created nor destroyed. Only transferred.

7.  Solid = definite shape and volume  Liquid = definite volume, takes the shape of its container, and has the ability to flow  Gas = indefinite shape and volume

8.  Physical Change = a change that does not alter the identity of a substance (shape, size, state)  Chemical Change = a change in which one or more substances are converted into substances with different chemical properties

9. 1. Color Change 2. Production of a gas (bubbles) 3. NRG transfer ◦ Exothermic= NRG is released, feels warm ◦ Endothermic = NRG is absorbed, feels cold 4. Formation of a precipitate ◦ A cloudy solid formed from two clear liquids 5. Change in odor

10.  Pure Substances – Only one type of matter is present  Mixtures- More than one type of matter is present but each kind retains its own properties. Can be separated by physical means

11.  Heterogeneous = mixture that is not uniform ◦ How would you separate alphabet soup?  Homogeneous (aka “solutions”) = mixture in which the components are evenly distributed throughout ◦ How would you separate salt water? ◦ How would you separate salt and pepper? ◦ How would you separate pepper and sawdust?

12.  Atoms = building blocks of matter  Elements = composed of only one type of atom (Periodic Table of Elements) ◦ Metals ◦ Nonmetals ◦ Metalloids

13.  Compounds = two or more DIFFERENT atoms combine to form one substance ◦ Cannot be separated by physical means  Molecules = two or more SAME atoms combine to form one substance ◦ Cannot be separated by physical means ◦ 7 Diatomic: “diatomic” = 2 atoms  Ex. HONClBrIF