Lec4 - Announcements OWL help sessions in OWL Computer Lab...

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Unformatted text preview: Announcements OWL help sessions in OWL Computer Lab (CHM3222) through February 15 Register your clicker on Blackboard (select tools) First recorded Clicker Quiz Tues., Feb. 12. Special math brush-up session see Dr. Johnson after class Dr. Johnsons office hours: W & Th 1-2pm in CHM1102A Greg Beachleys office hours: W 4-5 pm in CHM1115 Fundamentals of General Chemistry CHEM131:13xx Spring 2008 Dr. S. Johnson Instructor Mr. Greg Beachley Teaching Assistant Tuesday and Thursday, 3:30-4:45 pm , CHM1402 Assignments Read: (Ch 1 ,2, 3) for Tues. read Chap. 3, Sec. 3.6-3.7, 4.1-4.2 WHW for Discussion Class: will be posted Friday (in Blackboard under Written Homework) OWL HW1: due 8 am, Mon. 2/11 OWL HW2 (Ch 3&4) will be available Friday, tomorrow Register clicker Bring clicker and calculator to lecture Get ready for a clicker question! Clicker Registration Problems? E-mail Dr. Johnson In the demonstration last class, r. Johnson reacted what type of metal with water? H a l o g e n L a n t h a n i d e A l k a l i n e e a r t h A l k a l i 8% 89% 3% 0% 1. Halogen 2. Lanthanide 3. Alkaline earth 4. Alkali Lecture Class 3 Outline associated with OWL HW2 & WHW2 Molecules, Compounds, & Formulas (3.1) Molecular Models (3.2) Ionic Compounds : formulas, Names, and Properties (3.3) Molecular Compounds : Formulas, Names, and Properties (3.4) Formulas, Compounds, and the Mole (3.5) COMPOUNDS COMPOUNDS are a combination of 2 or are a combination of 2 or more elements in definite ratios by mass. more elements in definite ratios by mass. The character of each element is lost when The character of each element is lost when forming a compound. forming a compound. MOLECULES MOLECULES are the smallest unit of a are the smallest unit of a compound that retains the characteristics of the compound that retains the characteristics of the compound. compound. Molecule smallest identifiable unit into which a pure substance can be divided ethanol Molecular Formula describes composition not structure C 2 H 6 O Condensed Formula describes how atoms are grouped CH 3 CH 2 OH Structural Formula describes how atoms are attached NaCl, salt NaCl NaCl , salt , salt Buckyball Buckyball , C , C 60 60 Ethanol, C Ethanol, C 2 H 6 O Ionic vs. Molecular CATION + ANION ---> COMPOUND (+) (-) CATION CATION + + ANION ANION ------ > COMPOUND > COMPOUND (+) (+) (-) A neutral compound: requires equal number of (+) & (-) charges....
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Lec4 - Announcements OWL help sessions in OWL Computer Lab...

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