Rec2 Representations Atoms Isotopes

Rec2 - CHEM 1251 Recitation Materials W eek 2 Representing Matter and Nuclear Model of the Atom Part I Molecular/Atomic Representations of Matter

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CHEM 1251 Recitation Materials Week 2 Recitation 2: Page 1 of 4 Representing Matter and Nuclear Model of the Atom Part I: Molecular/Atomic Representations of Matter Adapted from University of New Hampshire PLTL Materials Library (Bauer, Rickert, Langdon) In each of the above representations: Each circle is an atom. All atoms are shown. Match the molecular/atomic representation with the following descriptions. There may be NO representations that match. If that is the case, draw your own representation that matches the description. There may be more than one that matches. Treat each item independently. Circle the letter(s) that match. For each description, write at least two questions you have to ask yourself in order to evaluate the representations (see example). 1. Could contain hydrogen, H 2 , at room temperature Questions: Does the representation include at least one element depicted as diatomic molecules? Does the picture show the elemental diatomic molecules in the gas phase? A B C D E F G H None (draw your own representation) 2. A pure substance Questions: A B C D E F G H None (draw your own representation) 3. A pure compound Questions: A B C D E F G H None (draw your own representation) 4. A mixture of two compounds
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This note was uploaded on 12/10/2009 for the course CHEM 1111 at Colorado.

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Rec2 - CHEM 1251 Recitation Materials W eek 2 Representing Matter and Nuclear Model of the Atom Part I Molecular/Atomic Representations of Matter

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