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Chemical bonding

Pearson Guided Reading Activities KEY CH2

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Chapter 2: The Chemical Basis of Life 8 Copyright ? 2015 Pearson Education, Inc. name ________________________ Period _________ # 152826 Cust: Pearson Au: Reece Pg. No. 8 Title: Active Reading Guide for Campbell Biology: Concepts & Connections, 8e C / M / Y / K Short / Normal DESIGN SERVICES OF S4-CARLISLE Publishing Services Chapter 2: The Chemical Basis of Life Guided Reading Activities Big idea: Elements, atom, and compounds Answer the following questions as you read modules 2.1?2.4: 1. Match the following terms with their correct definitions: matter, trace element, emergent properties, element, and compound. a. A substance required by humans in small quantities: _____________

AP Bio Chapter 3 notes

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Chapter 3 ? Water & Fitness of the Environment Effect of Water?s Polarity Polarity of water causes hydrogen bonding Water is made up of 2 hydrogen and 1 oxygen; held together by 1 covalent bond Oxygen is slightly negative and hydrogen is slightly positive ?> polarity Polarity causes hydrogen to be attracted to other oxygen molecules, creating hydrogen bonds; each molecule can be connected to 4 other molecules 4 properties of water Water?s cohesion Stabilization of temperature Expansion upon freezing Versatility as a solvent Cohesion of water molecules Hydrogen bonds keep water molecules sticking together - hydrogen bonds are very weak; they form and reform with great frequency Cohesion: the process in which hydrogen bonds hold the substances together

chemistry/intro to bio

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Vaneza Paredes 1) Chemical Bonds Almost everything we do in life, even something as easy as breathing all comes from chemical bonds. There are strong bonds, as well as weak bonds. This all depends on the interactions of electrons. When a metal bonds with a nonmetal, an ionic bond was formed. This is very strong. A chemical bond formed by the sharing of one or more electrons, especially pairs of electrons, between atoms, is covalent bonding.

Chapter 4 Notes

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BIOL 1020 ? CHAPTER 4 LECTURE NOTES Chapter 4: Carbon and the molecular diversity of life Organic Compounds Organic compounds: any compound of carbon and another element or radical Inorganic: any compound that does not contain carbon. Carbon skeletons: the skeletal formula of an organic compound is a shorthand representation of its molecular structure Wide diversity in organic compounds Carbon has diverse bonding patterns. Carbon atomic structure How many valence electrons in a carbon atom? 4 How many covalent bonds can a carbon atom maximum form? 4 Bonding patterns Valence = 4 electrons Different molecular shape: chains, branches, ring, etc. Length difference. Hydrocarbons ? organic molecules consisting of only carbon and hydrogen e.g. propane

Bonding General concepts

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Bonding ? General Concepts Electronegativity: The ability of anatom in a molecule to attract shared electrons to itself. Ionic Bonds Electrons are transferred Electronegativity differences are generally greater than 1.7 The formation of ionic bonds is always exothermic! Determination of Ionic Character Compounds are ionic if they conduct electricity in their molten state Electronegativity difference is not the final determination of ionic character Coulomb?s Law ?The energy of interaction between a pair of ions is proportional to the product of their charges, divided by the distance between their centers? There will be a negative sign on the Energy once calculated?it indicates an attractive force so that the ion pair has lower energy than the separated ions.

Biology

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AP BIOLOGY VOCABULARY BioChemistry anion atomic mass atomic number cation chemical equilibrium covalent bond electronegativity hydrogen bond ionic bond isotope mass number orbital trace element valence valence electron van der Waals interaction acid adhesion aqueous solution base buffer cohesion heat heat of vaporization hydration shell hydrophilic hydrophobic molarity mole molecular mass pH solution specific heat surface tension temperature alcohol amino group carbonyl group carboxyl group enantiomer functional group hydroxyl group isomer organic chemistry phosphate group sulfhydryl group helix pleated sheet amino acid antiparallel carbohydrate cellulose chaperonin chitin cholesterol condensation reaction conformation denaturation deoxyribose fatty acid gene glycogen hydrolysis

Chapter 3 Notes

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Joey Miller AP Biology Chapter 3: Water and Life The Molecule that Supports Life Water is the biological medium here on Earth. Water is the only common substance to exist in the natural environment in all three physical states of matter. The solid state of water floats on the liquid, a rare property emerging from the chemistry of the water molecule. Polar Covalent Bonds in Water Molecules Result in Hydrogen Bonding Polar Covalent Bonds ? the electrons of the covalent bonds spend more time closer to one atom than another atom Polar Molecule ? The overall charge of a molecule is unevenly distributed

Biology Chemical Bonds PPT

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Chemical Bonds

Biol 210 General Biology 1 Lecture 2 Review Chemical Bonds Atomic Structure Nucleus Protons, mass = 1, charge = +1 Neutrons, mass = 1, charge = 0 Electrons Mass = negligible Charge = -1 # e? = # protons Outer shell (most energenic) e??s form chemical bonds Isotopes Some isotopes are stable, such as 1H2 Other isotopes are unstable, such as 1H3. When tritium decays, it gives off ? particle. Because the mass of an element includes the average isotope abundance, the mass and the atomic weight differ slightly Helium, He, atomic number 4, mass 4.003 Important Elements C HOPKINS CaFe Mg C = carbon H = hydrogen O = oxygen P = phosphorous K = potassium I = iodine N = nitrogen S = sulfur Ca = calcium Fe = iron Mg = magnesium Na = sodium Cl = chloride

Chapter 2

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AP Biology Reading Guide Chapter 2: The Chemical Context of Life Fred and Theresa Holtzclaw Copyright ? 2010 Pearson Education, Inc. - 1 - Name_______________________Period___________ Chapter 2: The Chemical Context of Life This chapter covers the basics that you may have learned in your chemistry class. Whether your teacher goes over this chapter, or assigns it for you do review on your own, the questions that follow should help you focus on the most important points. Concept 2.1 Matter consists of chemical elements in pure form and in combinations called compounds 1. Define and give an example of the following terms: matter element compound 2. What four elements make up 96% of all living matter?

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