Chemistry 9 Friday, September 15, 2006

Chemistry 9 Friday, September 15, 2006 - Friday Chemistry...

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Friday, September 15, 2006 Chemistry Compound Interest – Part II How are ionic and covalent compounds different? How does covalent bonding affect Energy? How do we name covalent compounds? How do we quantify compounds? Text: Sections 4.7-5.1, 5.3, Appendix A6 – A7 BONDING Compounds IONIC COVALENT Ions ironically bonded atoms covalently bonded To form molecules Attraction of opposite charges sharing of electrons Figure 4.6 ions held together by +/- attraction No NaCl molecules COVALENT BONDING 1. Two atoms share valence e- 2. Bonding in H2- Fig 5.1 E 0 r (distance between nuclei) Intersection E between atoms Note: each atom by itself already has some E (coulomb, Bohr) 1: fat apart; no intersection 2/3: each e- attraction to other nucleus 4: most suitable (best) bond length, bond E Figure 5.1 5: nuclei repel
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Friday, September 15, 2006 FORMULAS/NAMES FOR COVALENT COMPOUNDS 1. Formulas based on available oxidation states 2. Use Greek prefixes to indicate # of atoms - name ends in –ide CO – carbon monoxide CO 2
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Chemistry 9 Friday, September 15, 2006 - Friday Chemistry...

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