101D_FA09_wk05_doc2

101D_FA09_wk05_doc2 - 101D week 5, doc 2 Section Day, Time:...

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101D week 5, doc 2 Section Day, Time: Team: Manager: Blogger: Scribe: Researcher: Chemical Nomenclature ~ What’s in a name?~ GOALS Learn how to name molecular compounds Learn how to name ionic compounds Understand the patterns in chemical names SKILLS Be able to name a chemical formula Be able to write the formula for a chemical name All molecular compounds are formed by sharing electrons. Each compound has its own unique chemical formula. When naming a molecular compound, the most metallic element is usually written first. The second element is named using the English stem and the suffix –ide . Metallic character – general trend on the periodic table: increases increases 1
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Numeric Prefixes Number Prefix 1 mono 2 di 3 tri 4 tetra 5 penta 6 hexa 7 hepta 8 octa 9 nona 10 deca Molecular Compounds 1. Which element on the periodic table is most metallic? Francium 2. Which element on the periodic table is least metallic? He 3. In a compound formed between phosphorous and fluorine, which element would be listed first? Phosphorous 4. What is the difference between PCl 3 and PCl 5 ? PCl 5 has two more Cl atoms 5. PCl 3 and PCl 5 are different chemical compounds and cannot have the same name. How would you distinguish between the compounds PCl 3 and PCl 5 by name? PCl 3 would be phospohorous trichloride versus PCl 5 which would be phosphorous pentachloride 6. Complete the following table: Name Formula nitrogen trifluoride NF 3 diphosphorous pentoxide P 2 O 5 2
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101D_FA09_wk05_doc2 - 101D week 5, doc 2 Section Day, Time:...

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