Transcription of Writing & Naming Formulas of Ionic & Covalent Compounds
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Writing & Naming Formulas of Ionic & Covalent Compounds
Writing & Naming Formulas of Ionic & Covalent Compounds 2006 - Douglas Gilliland The Physical Science Series index 1. Review of the Periodic Table Periods = number of e- energy levels. Groups (families) = the number of valence electrons (A - groups). IA VIIIA. 1. IIA IIIA IVA VA VIA VIIA. 2. 3 Transition Metals 4. 5. 6. 7. 6. 7. index 2. Metals have between 1 and 3 valence e- and have a loose hold on them. Nonmetals have between 5 and 7 valence e- and have a tight hold on them. Noble Gases Very IA VIIIA. 1. tight IIA IIIA IVA VA VIA VIIA. hold on 2. Transition Metals valence 3. 4. e-. 5. Atomic Radii decreases (more p+). 6. 7. Greater hold on valence electrons 6. 7. index 3. Types of Compounds : Ionic = Metal + Nonmetal Covalent = 2 Nometals or Metalloid & Nonmetal Metals Metalloids Nonmetals IA VIIIA. 1. IIA IIIA IVA VA VIA VIIA. 2. 3 Transition Metals 4. 5. 6. 7. 6. 7. 4. Chemical Compounds An atom consist of a positively charged nucleus Very Important!
Summing up: Ionic Ionic bonding occurs between a metal and a nonmetal. Metals lose all their valence e- and become cations. Nonmetals gain enough e- to fill their valence level and become anions. Always crisscross valences and reduce to determine the formulas of ionic compounds Do not use prefixes in the names. Ions form a crystalline lattice ...
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