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Transcript
Pg. 56 of IAN IONIC AND COVALENT BONDS OBJECTIVE: To learn the different types of chemical bonds. RESEARCH Octet Rule: atoms want 8 electrons in the valence (outer) energy level Ionic Bond: bond in which one or more electrons from one atom are removed and attached to another atom. This creates positive and negative ions which attract each other. (Acids, bases, salts do this): H+ Cl- or Na+Clusually a metal and a non-metal (Group I & Group VII) hydrogen (group I) 1 valence e- chlorine (group VII) 8e- 1 proton 2e17 protons H+ Cl- 7 valence e- Covalent Bond: forms between atoms when they share one or more electrons. usually 2 nonmetals. Carbon has 6 electrons (4 in the valence level). Carbon forms covalent bonds by sharing electrons. Pg. 55 of IAN OUTPUT- Electron Dot Diagrams Examples: cut and paste CH4 and O2 electron dot diagrams: Label your diagrams: CH4 = methane 02 = oxygen Homework: Create an electron dot model of: C2H4 (acetylene) Answer the following question: What is the difference between an ionic and a covalent bond?
