Lesson 15 Part II: Ionic Bonding & Intro to Lewis Structures

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1 Lesson 15 Part II: Ionic Bonding & Intro to Lewis Structures

2 Do Now: Follow all instructions to earn 5 points for participation grade. Take your CJs out write info down from board. Keep CJs out and open on desk. Take out your HW boxes 4 and 5 in Lesson 15 Part II notes. Date: Answer the following question(s) in a box on your do now sheet: 1. Brainstorm a list of things you know about polyatomic ions. 2. What is this separation technique shown below? What kind of mixtures are separated with this technique? How? 7B, 7Pb

3 Check your HW Boxes 4 & 5 in Lesson 15 Part II notes 2(+1) + 1(2) = 0 Gold (I) sulfide 1(+2) + 1(2) = 0 3(+2) + 2(3) = 0 Mercury (II) sulfate Manganese (II) phosphate 1(+2) + 2(1) = 0 Cobalt (II) bromite Ammonium fluoride

4 CaCO 3 Mg(NO 3 ) 2 (NH 4 ) 2 SO 4 Na 2 SO 4 Fe(OH) 3 Cr 3 (PO 4 ) 2 NaClO NaClO 4

5 Review halogen polyatomic ions One LESS oxygen One LESS oxygen One MORE oxygen ClO hypochlorite ClO 2 chlorite ClO 3 chlorate *most common ClO 4 perchlorate base name for chlorine

6 Review halogen polyatomic ions All have an overall charge of 1 One oxygen Hypo ite FO hypofluorite F Cl Br I ClO hypochlorite BrO hypobromite IO hypoiodite Two oxygens ite FO 2 fluorite ClO 2 chlorite BrO 2 bromite IO 2 iodite Three oxygens ate FO 3 fluorate ClO 3 chlorate BrO 3 bromate IO 3 iodate Four oxygens per ate FO 4 perfluorate ClO 4 perchlorate BrO 4 perbromate IO 4 periodate

7 Review Practice with Orbital Diagrams : Turn to p.5 in Lesson 15 Part II notes

8 Review Practice with Orbital Diagrams :

9 Review Practice with Orbital Diagrams : Be will lose these valence electrons How many fluorine atoms will accept Be s valence electrons? F has one spot to fill

10 Review Practice with Orbital Diagrams : BeF 2 2s now empty. 1s 2 is considered a full outer shell. Two fluorine atoms each accepted one electron. 2s 2 2p 6 is a full outer shell.

11 Review Practice with Orbital Diagrams :

12 Review Practice with Orbital Diagrams : Li will lose this valence electron O has two spots to fill

13 Review Practice with Orbital Diagrams : Li 2 O 2s now empty. 1s 2 is considered a full outer shell. One oxygen accepted two electrons, one from each Li atom. 2s 2 2p 6 is a full outer shell.

14 Intro to Lewis Dot Symbols: Guidelines: dots are used to represent electrons only valence electrons are included cations no dots & and positive charge anions will have a filled valence shell (8) & a negative charge

15 Intro to Lewis Dot Symbols: STEPS: 1. Find the number of valence electrons (A group elements = group number) 2. Write the element symbol. 3. Draw dots starting at the top of the symbol and continue clockwise.

16 EXAMPLES 1.Tin Group # 4A 4 How many valence electrons? Now move clockwise Sn

17 EXAMPLES 2. Sulfur Group # 6A 6 How many valence electrons? S

18 PRACTICE: Cu Br B Ne H Se

19 PRACTICE: Cu Br B Transition metals have 1 or 2 valence electrons

20 PRACTICE: Cu Br B Ne H Se

21 Lewis Structures are also used to show ions and ionic compound formation.

22 Lewis Structures are also used to show ions and ionic compound formation.

23 Lewis Structures are also used to show ions and ionic compound formation.

24 Lewis Structures are also used to show ions and ionic compound formation.

25 #1 F gains an electron F fluorine fluoride 8 valence electrons = full outer shell

26 #2 Na loses an electron Na + sodium sodium ion Cation has a full outer shell we don t draw the electrons for cations

27 #3 O gains two electrons O 2 oxygen oxide 8 valence electrons = full outer shell

28 PRACTICE: Selenide Beryllium ion Barium ion Potassium ion Nitride Phosphide

29 PRACTICE: Selenide Se 2 Beryllium ion Be 2+ Barium ion Ba 2+

30 PRACTICE: Selenide Se 2 Beryllium ion Be 2+ Barium ion Ba 2+ Potassium ion K Nitride N Phosphide P

31 EXAMPLE: Draw how an ionic compound would from between Li and O to form Li 2 O Li Li Each Li atom will donate their one valence electron.

32 EXAMPLE: Draw how an ionic compound would from between Li and O to form Li 2 O Li O Oxygen needs two electrons to have a full outer shell Li Each Li atom will donate their one valence electron.

33 EXAMPLE: Draw how an ionic compound would from between Li and O to form Li 2 O Li 1+ O 2 Oxygen needs two electrons to have a full outer shell Li 1+ Each Li atom will donate their one valence electron. Li 1+. Ȯ Li 1+

34 #2 PRACTICE: Draw how an ionic compound would from between Ca and F to form CaF 2 Ca 2+ F Alkaline earth ion Fluoride ion F Ca 2+. Ḟ F......

35 #3 PRACTICE: Draw how an ionic compound would from between Na and Cl to form NaCl Na 1+ Cl Na 1+.. Cl......

36 Homework: Parts I, II, III under Review & Practice in Lesson 15 Part 2.

37 Element # of electron shells Group number # of valence electrons Predict the ion it will form: Metal, nonmetal, metalloid? Na 3 1A 1 Na + metal K Sr B P Cl Kr

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