1. Basic Chemistry CHAPTER 2-3

2. Polarity Covalently bonded molecules

3. Polarity Some are non-polar Electrically neutral as a molecule Some are polar Have a positive and negative side

4. Polarity https://www.youtube.com/watch?v=PVL24HAesnc

5. Hydrogen bonds Weak chemical bonds Hydrogen is attracted to the negative portion of polar molecule Provides attraction between molecules

6. Hydrogen bonds

7. How many drops of water can you fit on a penny? Who can guess correctly??

8. Patterns of Chemical Reactions

9. Synthesis reaction (A + B  AB) Atoms or molecules combine Energy is absorbed for bond formation

10. Synthesis reaction (A + B  AB)

11. Decomposition reaction (AB  A + B) Molecule is broken down Chemical energy is released

12. Decomposition reaction (AB  A + B)

13. Synthesis or Decomposition Reaction?

14. Synthesis: Fe + O2  FeO2

15. Exchange reaction (AB + C  AC + B) Involves both synthesis and decomposition reactions Switch is made between molecule parts and different molecules are made

16. Exchange reaction (AB + C  AC + B)

17. Biochemistry: Essentials for Life

18. Organic compounds

19. Contain carbon Mostly LARGE! Most are covalently bonded Example: C 6 H 12 O 6 (glucose)

20. Inorganic compounds Lack carbon Tend to be SMALL / SIMPLE Example: H 2 O (water)

21. Inorganic Compounds WATER!! Important properties

22. Water Article Read the article on the important properties of water Identify the explain the 5 properties listed that account for its ability to support life. List a reason why each property is essential

23. Inorganic Compounds WATER!! High heat capacity (thermal stability) Adhesion/cohesion Polarity/solvent properties Chemical reactivity Cushioning Cerebrospinal fluid Amniotic fluid

24. Important Inorganic compounds SaltsAcidsBases pH (Acid-base concentrations

25. Important Organic compounds CarbohydratesMonosaccharidesDisaccharidesPolysaccharidesLipidsTriglyceridesPhospholipidsSteroidsCholesterol ProteinsEnzymes Nucleic Acids ATP