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Valence

Chapter 2 Test Bank AP Bio

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Campbell's Biology, 9e (Reece et al.) Chapter 2 The Chemical Context of Life This chapter presents basic chemical principles for understanding the chemical context of living organisms, from atomic structure to the nature of chemical bonds and an introduction to chemical equilibrium. These questions focus on elements most important to life or the study of life, including the elements that comprise organic molecules and important trace elements. Some isotopes are important in geologic dating and in biological tracer studies. How elements participate in forming different types of chemical bonds is essential to mastering subsequent topics on the behavior and properties of biological molecules, structures, and energy metabolism. Multiple-Choice Questions

Campbell Biology 9th Edition Chapter 2

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ELEMENT ATOMIC # ATOMIC WEIGHT VALENCE ELECTRONS COVALENT BONDS H hydrogen 1 1 C carbon 6 12 N nitrogen 7 14 O oxygen 8 16 P phosphorus 15 31 S sulfur 16 32 1 4 5 6 5 6 1 4 3 2 3 2 SPONCH Facts CHAPTER 2: THE CHEMICAL CONTEXT OF LIFE Chapter 2: The Chemical Context of Life ?Devil?s Gardens? Overview: A Chemical Connection to Biology Biology is a multidisciplinary science Living organisms are subject to basic laws of physics and chemistry One example is the use of formic acid by ants to maintain ?devil?s gardens,? stands of Duroia trees Sodium Chlorine sodium chloride- a compound Elements and Compounds Matter is made up of elements An element is a substance that cannot be broken down to other substances by chemical reactions

Honors Chem Notes - Bohr Models Dot Diagrams - powerpoint pdf

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I. Valence Electron ?Are the electrons in the HIGHEST energy level. II. The Octet Rule ?Most atoms tend to be more stable when their outer shell contains eight electrons. ?Atoms with fewer than 8 electrons are more reactive. Na VI. The Electron Dot Diagram ?Is a dot representing the number of electrons in the outer shell. What about Chlorine? Cl Na Cl 1 Electron in the outer shell 7 Electrons in the outer shell Let?s think??? What is the pattern? Assignment ?Complete worksheet on Electron Dot Diagrams!! ?This will be due next class!!

Ap Bio chap2_3 ppt

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The Chemistry of Life Why are we studying chemistry? Chemistry is the foundation of Biology Proton Neutron Electron Hydrogen 1 proton 1 electron Oxygen 8 protons 8 neutrons 8 electrons + 0 ? Everything is made of matter Matter is made of atoms The World of Elements C Different kinds of atoms = elements H O N P S Na K Mg Ca Life requires ~25 chemical elements About 25 elements are essential for life Four elements make up 96% of living matter: ? carbon (C) ? hydrogen (H) ? oxygen (O) ? nitrogen (N) Four elements make up most of remaining 4%: ? phosphorus (P) ? calcium (Ca) ? sulfur (S) ? potassium (K) Effect of electrons electrons determine chemical behavior of atom depends on number of electrons in atom?s outermost shell valence shell Bonding properties

Biochemistry powerpoint

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Chapter 2 The Chemical Context of Life Basic Terms Element = cannot be broken down to other substances Examples: Na, O, C, Cl Compound = combination of 2 or more different elements Examples: NaCl, CO2, CH4 Requirements for Life 92 natural elements? 25 are essential to life Carbon, oxygen, hydrogen, and nitrogen make up 96% of living matter Trace elements are needed, too, though Iodine?lack of = goiter!! Atomic Structure Atom = smallest possible amount of an electron that retains the element?s properties Subatomic particles: Protons = + charge Electrons = - charge Neutrons = neutral charge Atomic Structure Atomic Number: # of protons (also equals # of electrons?) Mass Number: # of protons + # of neutrons Examples Isotopes

Pearson Biology Guided Reading Answers Chapter 2

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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: _____________

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: _____________

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 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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