1. Looking At Water Symbols, Formulas, Equations

2. Entry Task: On a White Board, Draw your answer to 3.d (Pictures in the Mind)

3. Compare visual models for 3.d Does each model depict the same type of sample? Discuss similarities & differences Do the differences help or hinder your ability to visualize the type of matter depicted? Explain

4. Correct B.5 Pictures in the Mind 5 - 7

5. Vocabulary Review: Matter: has mass, takes up space. Everything you can touch. On a white board, Identify something made of matter.

6. Vocabulary Review: Substance: a material with a uniform (homogeneous) and definite composition. Example: water is always H 2 O On a white board, Identify something that is a substance.

7. Vocabulary Review: Mixture: composed of two or more physically separable components in ratios varying from sample to sample. Example: chocolate chip cookies (ratio of cookie to chocolate chips will vary from cookie to cookie) On a white board, Identify a mixture. Explain why it is a mixture.

8. Vocabulary Review: Molecule: two or more atoms bonded together. Make up the smallest unit of a molecular compound retaining the properties of that substance. Example: O 2 or H 2 O On a white board, Identify a molecule you are familiar with.

9. Vocabulary Review: Element: Made of just one type of atom. Can be just one atom or may be more than one atom. Examples: Oxygen (O 2 ), Hydrogen (H 2 ), Diamond (C) Compounds: Two or more types of atoms chemically bonded Examples: CO 2, H 2 O, C 6 H 12 O 6

10. Vocabulary Review: On a white board, Draw & label a model of an element Draw & Label a model of a compound

11. Vocabulary Review: Mixture: composed of two or more physically separable components in ratios varying from sample to sample. Example: chocolate chip cookies (ratio of cookie to chocolate chips will vary from cookie to cookie) On a white board, Identify a mixture. Explain why it is a mixture.

12. Correct B7: P – phosphorous Ni – nickel Cu – copper Co – cobalt Br – bromine K – potassium Na – sodium Fe - iron Symbol is more uniform throughout world Names are specific to languages, symbols are universal.

13. Correct B.7 a.2 hydrogen atoms, 2 oxygen atoms b.1 calcium atom, 2 chlorine atoms c.1 sodium atom, 1 hydrogen atom, 1 carbon atom, 3 oxygen atoms d.2 hydrogen atoms, 1 sulfur atom, 4 oxygen atoms

14. Correct B.7 a.One molecule of methane (CH 4 ) reacts with two molecules of O 2 to produce one molecule of CO 2 and two molecules of water (H 2 O) b.CH4 – compound O2 – element CO2 – compound H2O – compound c.1C atoms + 4 H atoms + 4 O atoms  1 C atom + 4 O atoms + 4 H atoms d.

15. Correct B.10 CationAnionFormulaName Ca 2+ SO 4 2- CaSO 4 Calcium sulfate Ca 2+ PO 4 3- Ca 3 (PO 4 )Calcium phosphate NH 4 + NO 3 - NH 4 NO 3 Ammonium nitrate Al 3+ SO 4 2- Al 2 (SO 4 ) 3 Aluminum sulfate Mg 2+ OH - Mg(OH) 2 Magnesium hydroxide Ca 2+ CO 3 2- CaCO 3 Calcium Carbonate

16. Practice Ions & Ionic Compounds

17. Homework: ChemComm: Finish Practice Ions & Ionic Compounds BRING BOOKS ON THURSDAY!!!