M1_3s-1 - Unit 3 How do we predict properties? The central...

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Chemistry XXI The central goal of this unit is to help you develop ways of thinking that can be used to predict the physical properties of chemical compounds based on their submicroscopic structure . Unit 3 How do we predict properties? How do you think structure determines properties in each of these cases? Why do we care? Light Emitting Diodes Soft and rigid Plastics Soaps and Detergents
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Chemistry XXI Unit 3 How do we predict properties? M1. Analyzing Molecular Structure Predicting properties based on molecular structure . M4. Exploring Electronic Structure Predicting properties based on electron-configurations. M3. Characterizing Ionic Networks Predicting properties based on ion charge and size. FOUR MAIN MODULES M2. Considering Conformations Predicting properties based on spatial conformations.
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Chemistry XXI 1. How do we distinguish substances? 2. How do we determine structure? Learning Progression 3. How do we predict properties? Particulate Z o o m I n Macro Molecular Atomic Electronic Z o o m O u t Molecular Particulate Macro Structure- Properties
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Chemistry XXI Integration To illustrate the power of chemical ideas and models in predicting the physical properties of chemical substances we will focus our attention on materials’ analysis and design. How can we use structural information to predict properties? How can we use properties to derive structural information?
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Chemistry XXI Unit 3 How do we predict properties? Module 1: Analyzing Molecular Structure Central goal: To explain and predict the physical properties of molecular compounds based on the nature and strength of the intermolecular interactions among their molecules.
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Chemistry XXI The Challenge One of advantages of chemical thinking is that it allows us to explain and predict the physical and chemical properties of molecular substances based on their molecular structure. Modeling How do I predict it? How can use what we know to make such predictions? How can we take advantage of this way of thinking to design materials with the desired properties?
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Chemistry XXI The Power of Classification Predictions about the properties of substances are greatly facilitated by identifying the types of elements present in the system.
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Chemistry XXI Molecular Compounds For example, if the substance contains nonmetallic elements , it is likely to be molecular. Differences in electronegativities are such that nonmetallic elements combine forming individual molecules with polar covalent bonds .
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Chemistry XXI In order to make predictions about the physical properties of a molecular substance , we need to recognize that these properties “ emerge ” from the interactions of many molecules. Emergence
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M1_3s-1 - Unit 3 How do we predict properties? The central...

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