1. Unit 3: The Chemistry of Life Ch. 2 (pg. 30), Ch. 9 (pg. 185-186), Ch. 28 (pg. 586-587) The study of matter & the changes it undergoes 200

2. What is an Element? a substance made of only one type of atom ex. = carbon, hydrogen, nitrogen, oxygen, phosphorous, sulfur

3. What are the 6 Most Abundant Elements in Biological Matter?

4. the smallest part of an element What are Atoms?

5. What Makes Up an Atom? Subatomic particle Locationchargesymbol protonnucleus (center of atom)positive p+p+ neutronnucleus (center of atom)neutral (no charge) n0n0 electronorbit around nucleus (located in energy levels) negative e-e- 17 p + 18 n 0

6. 16 Using the Periodic Table of the Elements to Determine Atomic Structure # of protons (determines the element & its properties) protons + neutrons also # of electrons bigger of the 2 #s To figure out # of neutrons… atomic mass – atomic number = neutrons

7. Na Electrons & Energy Levels electrons in energy levels (“shells”) around nucleus 1 st shell  up to 2 electrons other shells  up to 8 electrons (fill before go to next) How many more electrons can the 3 rd shell hold? 17 p + 18 n 0

8. What Affects the Bonding of Atoms? the # of outer (valence) level electrons If outer level is: not full, atom is unstable will bond with electrons from other atom(s) to fill outer level full, atom is stable won’t bond

9. atoms are held together by shared electrons What causes a Covalent Bond?

10. What causes an Ionic Bond? atoms are held together when they lose or gain electrons Atoms & Bonding Interactive

11. combinations of two or more atoms bonded together ex. = O 2, H 2 0, C 6 H 12 O 6, NaCl, HCl What are Molecules/Compounds?

12. inorganic molecules simple structure/ few atoms not carbon-based H 2 0, 0 2, NH 3, CO 2 an exception to the rule inorganic even though it contains carbon Biological Chemistry

13. organic molecules contain: carbon & usually hydrogen complex structure/ many atoms

14. Biological Chemistry: Monomers & Polymers monomer = small molecule polymer = large molecule made of repeated monomers

15. 4 major types of organic biological macromolecules 1. 1. carbohydrates 2. 2. lipids (fats) 3. 3. proteins 4. 4. nucleic acids amino acidpolypeptide (protein) nucleotidenucleic acid (DNA & RNA) monosaccharidepolysaccharide fatty acids & glycerolLipid

16. Examples of Carbohydrates cellulose sugar starch

17. Functions of Carbohydrates Main energy source, energy storage, support (plant cell walls) cellulose

18. Examples of Lipids fat oil

19. Functions of Lipids long-term energy storage, cell membrane, hormones, insulation, nerve transmission

20. Examples of Proteins Meat/ fish/ eggs/ nuts/ beans hormone muscle

21. Functions of Proteins structure, enzymes, transport materials in & out of cells, hormones, muscle hormone muscle

22. Nucleic Acid (entire structure) Examples of Nucleic Acids

23. Functions of Nucleic Acids DNA genetic “blueprint” RNA helps to build (synthesize) proteins

24. Organic Biological Macromolecule Elements Contained Monomer (building blocks) PolymerFunction Carbohydrates (sugars, starches, cellulose) C, H, Omonosaccharide (simple sugars such as glucose) polysaccharide (such as starch & cellulose) Energy source, energy storage, plant cell walls Lipids (fats, oils, & waxes) C, H, OFatty acids & Glycerol (2 types of simple molecules… NOT monomers.) Not applicableLong-term energy storage, cell membrane, hormones, insulation, nerve transmission Protein (muscle, enzymes, hormones, meats/fish/eggs/ nuts/beans) C, H, O, N, S Amino acids (20 different A.A.) PolypeptidesStructure, enzymes, transport materials in & out of cells, hormones, muscle Nucleic Acids (DNA & RNA) C, H, O, N, P Nucleotides (sugar-phosphate backbone & nitrogenous bases) Polynucleotide (Nucleic Acids) Carries genetic code (“blueprint for organism”) & directs protein synthesis Organic Biological Macromolecules