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

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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. Johnson’s office hours: W & Th 1-2pm in CHM1102A • Greg Beachley’s 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...

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