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Topic: Names, Formulas, Equations, & Reactions

Topic: Names, Formulas, Equations, & Reactions. Aim: How do we name & write formulas for covalent & ionic compounds? Do now: What types of elements form covalent bonds? Ionic bonds? HW:. Naming Compounds. Method depends on types of bonds. Naming Covalent Compounds. Between nonmetals

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Topic: Names, Formulas, Equations, & Reactions

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  1. Topic: Names, Formulas, Equations, & Reactions Aim: How do we name & write formulas for covalent & ionic compounds? Do now: What types of elements form covalent bonds? Ionic bonds? HW:

  2. Naming Compounds • Method depends on types of bonds

  3. Naming Covalent Compounds • Between nonmetals • Name 1st element • give prefix if more than 1 (check subscript) • Name 2nd element • Always give prefix • Change ending to -ide 1 - mono 2 - di 3 - tri 4 - tetra 5 - penta 6 - hexa 7 - hepta 8 - octa 9 - nona 10 - deca

  4. Naming Covalent Compounds CO NO SiF4 SF2 CO2 N2O2 Carbon Monoxide Nitrogen Monoxide Silicon Tetrafluoride Sulfur Difluoride Carbon Dioxide Dinitrogen Dioxide S4N4 N2O4 CCl4 O2F2 CF4 P4O10 Tetrasulfur Tetranitride Dinitrogen Tetroxide Carbon Tetrachloride Dioxygen Difluoride Carbon Tetrafluoride Tetraphosphorus Decoxide

  5. Writing Formulas for Covalent Compounds • Write the symbol for the element • The prefix in the name tells you the subscript to use

  6. Formulas – Covalent Compounds Carbon monoxide Phosphorus trichloride Sulfur hexafluoride Sulfur dioxide Nitrogen dioxide CO PCl3 SF6 SO2 NO2 Dinitrogen monoxide Boron tribromide Carbon tetrabromide Carbon dioxide Dichlorine monoxide N2O BBr3 CBr4 CO2 Cl2O Exceptions: H2O – water NH3 – ammonia CH4 – methane (& other organic mlcls)

  7. Naming Ionic Compounds • Can be binary – 2 elements • Can have polyatomic ions - >2 elements • See Table E

  8. Naming Binary Ionic Cpds • Name metal first (positive charge) • Name nonmetal second (negative charge) • Change the ending to –ide • NO PREFIXES!! • Ever.

  9. Naming Binary Ionic Cpds KCl MgS AlN NaBr AlP Potassium chloride Magnesium sulfide Aluminum nitride Sodium bromide Aluminum phosphide AlF3 CaI2 Li2S BeO MgCl2 Aluminum fluoride Calcium iodide Lithium sulfide Beryllium oxide Magnesium chloride

  10. Formulas – Binary Ionic Cpds • + charges and – charges must cancel out • Cpds are neutral overall. • There are no prefixes to help you out! • ***CRISS-CROSS METHOD*** • Take oxidation state of each element & criss-cross them to get your formula • Use top # for nonmetal • Do not include charge in the final formula Al F Al F +3 -1 3

  11. Formulas – Binary Ionic Cpds Lithium fluoride Aluminum nitride Calcium oxide Sodium sulfide Magnesium bromide LiF AlN CaO Na2S MgBr2 Beryllium chloride Potassium iodide Aluminum oxide Calcium fluoride Lithium oxide BeCl2 KI Al2O3 CaF2 Li2O

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