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Hydrogen bond

AP bio summer hw ch 2 questions

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AP Biology Summer Assignment Unit 2: The Chemistry of Life Ch. 2- Write the key concepts from chapter 2 (include concept number also). These are listed for you in the front of each chapter. The key concepts from chapter 2 are concept 2.1 which states, ?Matter consists of chemical elements in pure form and in combinations called compounds.? Concept 2.2 which states, ?An element?s properties depend on the structure of its atom.? Concept 2.3 which states, ?The formation and function of molecules depend on chemical bonding between atoms.? And lastly concept 2.4 which states, ?Chemical reactions make and break chemical bonds. Ch. 3- Use illustrations to describe how the structure of a water molecule allows it to form hydrogen bonds with other water molecules.

Bob Jones PPT Notes -- Chapter 7b

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Molecular Geometry 1 Valence Shell Electron Pair Repulsion (VSEPR) Theory Electron concentrations are arranged so as to be at maximum distance. Why? Electrons repel each other. Number of Electron Concentrations H H H H C ? ? ? ? Ex: CH4 O F F C ? ? ? ? Ex: CF2O Number of Electron Concentrations all 4 bonded = tetrahedral Ex: CH4 H H H H C ? ? ? ? 4 Regions of e? Conc. 5 Chemistry textbook, p. 169 3 bonded = pyramidal Ex: NH3 H H H N ? ? ? 4 Regions of e? Conc. 6 Chemistry textbook, p. 167 2 bonded = bent 104.5? Ex: H2O H H O ? ? 4 Regions of e? Conc. 7 Chemistry textbook, p. 170 1 bonded = linear Ex: HF H F ? 4 Regions of e? Conc. 8 Chemistry textbook, p. 170 All 3 bonded = trigonal planar 2 bonded = bent 120? Ex: BI3 Ex: GeF2 1 bonded = linear Ex: SO 3 Regions of e? Conc.

Campbell Biology Test Bank Chapter 4

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Campbell's Biology, 9e (Reece et al.) Chapter 4 Carbon and the Molecular Diversity of Life This chapter focuses on the chemistry of carbon and organic compounds. Students should be able to identify the nature of the bonds between carbon and other elements (nonpolar versus polar), the different types of weak bonds and interactions, the various types of isomers, the basic functional groups of organic molecules, and their relative solubility in water. The abiotic formation of organic molecules from inorganic molecules is important in the origin of life. Multiple-Choice Questions 1) The element present in all organic molecules is A) hydrogen. B) oxygen. C) carbon. D) nitrogen. E) phosphorus. Answer: C Topic: Concept 4.1 Skill: Knowledge/Comprehension

Campbell Biology Test Bank Chapter 2

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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

CHEM 1A midterm 1

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Chemistry 1A, Fall 2011 Midterm Exam #1 September 20, 2011 (90 min, closed book) Name:__________________________________ SID:___________________________________ GSI Name:________________ ? The test consists of 4 short answer questions and 18 multiple choice questions. ? Put your written answers in the boxes provided. Answers outside the boxes may not be considered in grading. ? Write your name on every page of the exam. Question Page Points Score Multiple Choice (1-18) 2-7 55 Formic acid Short Answer 3 8 Hydrogen Storage Short Answer 3 4 Capsaicin Short Answer 5 4 Rubber Short Answer 7 4 Total 75 Useful Equations and Constants: PV = nRT

Chapter 8

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Claire Rafson Chapter 8 Notes 8.1- Bond Energy- The strength of a bonding interaction. The energy required to break the bond. Why do bonds occur? So the system can achieve the lowest possible energy by behaving in this way. Ionic bonding- electrostatic attractions of the closely packed, oppositiyly charged ions. Ionic compound- Metal reacts with a nonmetal Coulombs law- interaction between pair of ions. E= (2.31X 10^-19 J* nm) (Q1Q2/r) A bond will form if the energy of the aggregate is lower than that of the separated atoms. Covalent bonds- type of bonding in which electrons are shared by nuclei. (i.e Hydrogen bonding) Polar Covalent Bond- Atoms are different enough that they have unequal sharing results. 8.2-

Cambell Biology 7th edition Chemistry notes

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The Chemical Basis of Life ?We are stardust? nasa.gov Students should be able to: Define: element, atom and molecule Name the components of atoms and their physical arrangements. Draw a diagram of an atom, given the atomic number. Distinguish between the types of chemical bonds. Element: a substance that cannot be broken down to other substancesPeriodic Table: organizational chart of all the elements http://www.periodictable.com/ Table 2.1 5 Table 2.1 Elements In the Human Body ATOM: from Greek atomos, ?unable to be cut? Atomic Structure An atom is the smallest unit of matter that still retains the properties of an element. Three subatomic particles in atoms are relevant to our discussion of the properties of elements. Protons are positively charged.

BIO 101 MOCK EXAM 1

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Bio 101- Sparace Fall 2013 Mock Exam 1: Chpt 2-7 15 / P / 30.973761 What is the atomic mass of Phosphorus? 5 8 15 30.973761 How many valence electrons does Phosphorus have? 2 5 8 15 Which of the following is NOT one of the four elements that make up 90% of living matter? Carbon Oxygen Helium Nitrogen Hydrogen What are the subatomic particles that make up atoms? Px, Py, and Pz Protons, neutrons, and electrons Anions, cations, and nutrions Carbon, oxygen, and hydrogen What is the sum of protons and neutrons? Atomic number Nuclear ratio Electronegativity Atomic mass Which bonds rely on the equal or unequal sharing of electrons? Hydrogen Bonds

chemistry

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AP Chemistry Final Exam Version P Fall 2005 3 Free Response questions, 45 minutes CALCULATORS MAY BE USED. You will also have a periodic table, equation sheets, and the standard reduction potential table. Clearly show the method used and the steps involved in arriving at your answers. It is to your advantage to do this, since you may obtain partial credit if you do and you will receive little or no credit if you do not. Attention should be paid to significant figures. Note: For all questions, assume that the temperature is 298 K, the pressure is 1.00 atmospheres, and solutions are aqueous unless otherwise specified. Record all your work on this exam; you will only be given credit for answers showing work. NAME: PERIOD: 1 2 3 4 January 10-12, 2006

Campbell Biology 9th Edition chapter04 test Bank with Answer

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Campbell's Biology, 9e (Reece et al.) Chapter 4 Carbon and the Molecular Diversity of Life This chapter focuses on the chemistry of carbon and organic compounds. Students should be able to identify the nature of the bonds between carbon and other elements (nonpolar versus polar), the different types of weak bonds and interactions, the various types of isomers, the basic functional groups of organic molecules, and their relative solubility in water. The abiotic formation of organic molecules from inorganic molecules is important in the origin of life. Multiple-Choice Questions 1) The element present in all organic molecules is A) hydrogen. B) oxygen. C) carbon. D) nitrogen. E) phosphorus. Answer: C Topic: Concept 4.1 Skill: Knowledge/Comprehension

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