Lecture_05_011312 - Lecture 5: Naming Simple Compounds •...

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Unformatted text preview: Lecture 5: Naming Simple Compounds • Outline (Ch. 2.8-2.9):- Introduction to the Periodic Table (2.8)- Naming Simple Compounds (2.9) • Problems for Extra Practice: 2.45, 2.57, 2.49, 2.51, 2.53 The Periodic Table (Figure 2.20) Group Number and Ionic Charge Ions • of metals in Groups 1A(1), 2A(2), or 3A(13) have positive 1 + , 2 + , or 3 + charge. • Of nonmetals in Groups 5A(15), 6A(16), or 7A(17) have negative 3 – , 2 – , or 1 – charge. metals tend to lose electrons nonmetals tend to gain electrons Concept Review What monatomic ions will each of the elements form? a) Ba, barium (z = 56) b) S, sulfur (z = 16) c) Ti, titanium (z = 22) d) F, fluorine (z = 9) Isoelectronic Atoms • Write the chemical symbols for three different atoms or atomic anions with 17 electrons. Cl b 17 p, 17 e- S b 16 p, 16 e- S- b 16p, 17 e- P b 15 p, 15 e- P 2- b 15 p, 17e- Naming Simple Compounds • Binary Compounds – – comprised of two elements • Ionic – cation (positive ion) and anion (negative ion) – metal + nonmetal; two types of metals – Type I and Type II • Covalent – between two nonmetals • Ionic Compounds with Polyatomic Ions – – contain ions comprised of several elements • Acids – Molecule with H + ions attached to anion • Do not contain oxygen • Contain oxygen Binary Compounds (Type I; Ionic) • Cation named first and the anion second • Monatomic cation takes in name from the element • Monatomic anion is named by taking the first part of the element and adding –ide . Formula Ions Name Cation Anion NaCl Na + Cl – sodium chloride K 2 S K + S 2– potassium sulfide MgO Mg 2+ O 2– magnesium oxide CaI 2 Ca 2+ I – calcium iodide Al 2 O 3 Al 3+ S 2– aluminum sulfide Examples of Binary Compounds (Type I; Ionic) Write the names of the following compounds: 1) CaO ___________ 2) KBr ___________ 3) Al 2 O 3 ___________ 4) MgCl 2 ___________ Concept Review Give the name and chemical formulas of the...
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This note was uploaded on 01/18/2012 for the course CHEM 142B taught by Professor John during the Winter '11 term at University of Washington.

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Lecture_05_011312 - Lecture 5: Naming Simple Compounds •...

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