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Covalent bond

Organic Chemistry Lecture 2

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Chapter 2 ? 2010, Prentice Hall Organic Chemistry, 7th Edition L. G. Wade, Jr. Structure and Properties of Organic Molecules Chapter 2 * Wave Properties of Electrons Standing wave vibrates in fixed location. Wave function, ?, is a mathematical description of size, shape, and orientation. Amplitude may be positive or negative. Node: Amplitude is zero. Chapter 2 Chapter 2 * Wave Interactions Linear combination of atomic orbitals: between different atoms is bond formation. on the same atom is hybridization. Conservation of orbitals Waves that are in phase add together. Amplitude increases. Waves that are out of phase cancel out. Chapter 2 Chapter 2 * Sigma Bonding Electron density lies between the nuclei. A bond may be formed by s?s, p?p, s?p, or hybridized orbital overlaps.

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: _____________

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 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?

What is a molecule?

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Molecule Main article: Molecule A molecule is the smallest indivisible portion of a pure chemical substance that has its unique set of chemical properties, that is, its potential to undergo a certain set of chemical reactions with other substances. Molecules can exist as electrically neutral units unlike ions. Molecules are typically a set of atoms bound together by covalent bonds, such that the structure is electrically neutral and all valence electrons are paired with other electrons either in bonds or in lone pairs.

Ionic/Covalent Bonds

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Ionic bond is between a metal and non-metal and has the electronegativity difference of 1.7 or higher. Also Ionic bonds take electrons from other elements. Convalent is usually between a non-metal and non-metal and shares electrons.
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