18 Oct. 2010

18 Oct. 2010

Take out Homework: Week 6 Homework #6-9 AND class work from Friday

Objective: SWBAT model and describe the structure of atoms and trends in ionization.

Do now: Sketch an atom of sodium. Draw an arrow pointing to the valence shell. How many valence electrons are there? What ion does sodium form? Write the symbol.

Agenda

I. Do now, homework checkII. Review from last weekIII. Clicker “quiz” (counts as classwork

grade)IV. Hand back papers and progress

reportsHomework: none

Review from last week

Objective: SWBAT model atomic structure and relate valence shell electrons to trends on the periodic table.

Ions formed by group - Add to your PTE

1

2 3 4 5 6 7

81+

2+

3+

3- 2- 1-

Cations Anions

Lose e- Gain e-


How many TOTAL electrons does an atom of Lithium (Li) have?

1 2 3 4

25% 25%25%25%1. 22. 13. 34. 7


How many TOTAL electrons does an atom of Magnesium (Mg) have?

1 2 3 4

25% 25%25%25%1. 22. 33. 124. 24


How many TOTAL electrons does an atom of Chlorine (Cl) have?

1 2 3 4

25% 25%25%25%1. 22. 73. 174. 35


How many VALENCE electrons does an atom of Lithium (Li) have?

1 2 3 4

25% 25%25%25%1. 12. 23. 34. 7


How many VALENCE electrons does an atom of Magnesium (Mg) have?

1 2 3 4

25% 25%25%25%1. 22. 33. 124. 24


How many VALENCE electrons does an atom of Chlorine (Cl) have?

1 2 3 4

25% 25%25%25%1. 22. 73. 174. 35


Since Chlorine has 7 valence electrons, to satisfy the octet rule, it must:

1 2 3 4

25% 25%25%25%1. Do nothing2. Gain one

electron3. Lose one

electron4. Lose 7 electrons


Since Lithium has 1 valence electron, to satisfy the octet rule, it must:

1 2 3 4

25% 25%25%25%1. Do nothing2. Gain one

electron3. Lose one

electron4. Gain 7 electrons


Since Magnesium has 2 valence electrons, to satisfy the octet rule it must:

1 2 3 4

25% 25%25%25%1. Do nothing2. Gain 2 electrons3. Lose 2 electrons4. Gain 6 electrons


Since neon (Ne) has 8 valence electrons, to satisfy the octet rule it must:

1 2 3 4

25% 25%25%25%1. Do nothing2. Gain 2 electrons3. Lose 8 electrons4. Gain 8 electrons


Ions formed by group - Add to your PTE

1

2 3 4 5 6 7

81+

2+

3+

3- 2- 1-

Cations Anions

Lose e- Gain e-


What is the correct symbol for a Lithium ion?

1 2 3 4

25% 25%25%25%1. Li+

2. Li-

3. Li2+

4. Li2-


What is the correct symbol for a Magnesium ion?

1 2 3 4

25% 25%25%25%1. Mg+

2. Mg-

3. Mg2+

4. Mg2-


Which of the following pairings is correct?

1 2 3 4 5

20% 20% 20%20%20%1. Magnesium/Cation

2. Chlorine/Anion3. Lithium/Cation4. Sulfur/Anion5. All of the above


What is the name of the ion formed from the element Fluorine?

1 2 3 4

25% 25%25%25%1. Fluorine2. Fluorate3. Fluorite4. Fluoride


What is the name of the ion formed from the element Lithium?

1 2 3 4

25% 25%25%25%1. Lithium2. Lithiate3. Lithite4. Lithide

C: 19 Oct. 2010 Ionic Bonding

Copy in notebook: Objective: SWBAT model ionic bonding and write names and formulas for ionic compounds

Do now: On handout!! Draw a picture of one atom of sulfur. Draw an

arrow showing the valence shell. Answer the questions to the right.1. Total number of electrons: ___________2. Number of valence electrons: ___________3. Gain or lose electrons to form a full valence shell?

________4. How many will it gain or lose? ______5. Symbol with charge: _________

Agenda

I. Do nowII. Ionic bonding notesIII. Naming compounds practiceIV. Ionic bonding modelingV. Writing formulas practiceVI. Ionic bonding “Speed Dating”Homework: Finish Week 6 Homework

SWBAT model ionic bonding and write names and formulas for ionic compounds

A: 19 Oct. 2010 Ionic Bonding

Copy in notebook: Objective: SWBAT model ionic bonding and write names and formulas for ionic compounds

Do now: On handout!! Draw a picture of one atom of sulfur. Draw an

arrow showing the valence shell. Answer the questions to the right.1. Total number of electrons: ___________2. Number of valence electrons: ___________3. Gain or lose electrons to form a full valence shell?

________4. How many will it gain or lose? ______5. Symbol with charge: _________

Agenda

I. Do nowII. Ionic bonding notesIII. Naming compounds practiceIV. Ionic bonding modelingV. Writing formulas practiceHomework: Finish Week 6 Homework


Ionic Bonding

To gain or lose electrons, atoms need to give or take them from other atoms

Ionic bond – one atom gives one or more electrons to another atom The oppositely charged ions are attracted to

one another (electrostatic attraction) this causes them to become bonded

together Ions will transfer electrons (and bond) so

that they both get 8 valence e-


Illustrating ionic bonding

Dot Structures – show the element symbol with the valence electrons surrounding it on 4 sides

F Li


Ionic Bonding Demo with marbles


Sodium metal reacts with chlorine gas to form solid sodium chloride

Na+ + Cl- NaCl

Na

A: 20 Oct. 2010

Take Out Homework: Week 6 Homework Objective: SWBAT model ionic bonding and

write names and formulas for ionic compounds.

Do now: On your handout: Write the formula or the name of the ionic compounds below:1. magnesium chloride2. CaO3. sodium sulfide4. AlBr3

5. aluminum iodide

Agenda

I. Do nowII. Homework checkIII. Review writing names and

formulas for ionic compoundsIV. Ionic bonding “Speed Dating”Homework: Revise your Week 6

Homework

Naming ionic compounds

Write the cation name Name of the element

Write the anion name Beginning of element name + -ide

Ex 1: LiCl Ex 2: Al2O3


Practice Naming Ionic Compounds

1. CaF2

2. BeO3. Li2O

4. KBr5. Rb2S

6. Al2O3

7. SrCl2

8. MgO


Writing Formulas for Ionic Compounds

1. Write each ion symbol with the charge2. “Cross” the charges down to the

bottom of the opposite element3. Rewrite symbols with subscripts

1. Do not write + or –Example: Ex 1: lithium chloride

Ex 2: aluminum oxideEx 3: lithium sulfide

Writing formulas from names

1. potassium chloride2. magnesium bromide3. rubidium sulfide4. beryllium fluoride5. sodium oxide6. magnesium sulfide7. aluminum oxide8. aluminum iodide


IONS SPEED DATING

Fill in your 4 ion cards (8 minutes) Mingle with your classmates to make

10 ionic compounds. Fill in all four columns of the chart

Each correctly named compound will earn you 10 points. Each compound over 10 will earn you bonus points!

Check to be sure you write the CATION first!

Share out results of “speed dating”

Homework

Revise Week 6 Homework


A: 21 Oct. 2010

Take out homework: Week 6 Homework Objective: SWBAT write names and

formulas for ionic compounds with polyatomic ions

Do now: Write the formula or the name of the ionic compounds below:

1. magnesium oxide2. CaS3. lithium oxide4. AlF3

5. cesium sulfide

Agenda

I. Do nowII. Homework check: any remaining

questions?III. Review of writing formulas from

compound namesIV. Compounds with polyatomic ionsHomework: Week 7 Homework #1-30

So far, each ionic compound has had only two elements.

Can they have more than 2? yes!

Polyatomic Ions

Ions made of more than one element Have an overall charge Ex: NO3

-

This is a nitrogen atom, bonded to three oxygen atoms

The whole thing has a charge of 1-

Polyatomic Ions to Memorize

NO2- nitrite

NO3- nitrate

OH- hydroxide SO4

2- sulfate CO3

2- carbonate PO4

3- phosphate NH4

+ ammonium

Naming ionic compounds with polyatomic ions

Cation name + anion name If the anion is a polyatomic ion, use

the name of the polyatomic ion Ex 1) KNO3

Ex 2) Ca3(PO4)2

Writing names of ionic compounds

Given the formula, write the name:1. NaNO2

2. Ca(NO3)2

3. Rb2SO4

4. AlPO4

5. NH4Cl

6. Al2(CO3)3

7. Mg(OH)2

Writing Formulas for Ionic Compounds with Polyatomic Ions

1. Write the symbols/formulas with charges for the anion and the cation

2. “Cross” the charge down to the bottom of the other side

1. Do not write the + or –3. Rewrite formula without charges, but

with the subscripts only Ex 1) sodium sulfate Ex 2) magnesium nitrate

Writing Formulas

Write formulas for the following ionic compounds:

1. sodium nitrite2. sodium nitrate3. magnesium sulfate4. aluminum carbonate5. calcium hydroxide6. ammonium oxide7. ammonium chloride8. magnesium nitrate

Homework

Week 7 Homework #1-30

C: 22 Oct. 2010

Take Out Homework: Week 7 #1-30 Objective: SWBAT write names and formulas of

ionic compounds that use the stock system. Do now: Write the formula or the name of the

ionic compounds below. Don’t forget to use parenthesis when you cross the charges!

1. magnesium nitrate2. CaSO4

3. lithium hydroxide4. AlPO4

5. ammonium iodide

Agenda

I. Do nowII. Homework checkIII. Stock system: Names and formulasIV. Mixed practice: Writing names and

formulas of ANY ionic compound!Homework: Week 7 Homework #

A: 22 Oct. 2010

Take Out Homework: Week 7 #1-30 Objective: SWBAT write names and formulas of

ionic compounds that use the stock system. Do now: Write the formula or the name of the

ionic compounds below. Don’t forget to use parenthesis when you cross the charges!

1. magnesium nitrate2. CaSO4

3. lithium hydroxide4. AlPO4

5. ammonium iodide

Agenda

I. Do nowII. Homework checkIII. Stock system: Names and formulasHomework: Week 7 Homework #

So far, we have written names and formulas for ionic compounds with two elements, and ionic compounds with polyatomic ions.

What if the cation isn’t from groups 1, 2 or 13? Oh no!

Many elements from the middle of the periodic table (groups 3-13) form cations, but we don’t have a trend on the periodic table. Transition Metals

How do we know what charge these cations have?!

Stock system

Iron (Fe) Fe2+ Iron (II) Fe3+ Iron (II)

Using Roman Numerals to indicate which charge a transition metals have.

Which elements? Cr, Mn, Fe, Co, Cu, Hg, Sn, Pb

Examples: Writing formulas

Ex 1) iron (II) chloride Ex 2) copper (I) oxide Ex 3) tin (IV) sulfide

Examples: Writing names

Ex 1) Fe2O3

Ex 2) PbI2

Ex 3) FeO

Practice Problems Write the names or formulas for the

following ionic compounds using the stock system

1. CuI2

2. lead (II) sulfide3. CuBr2

4. iron (II) chloride5. SnO6. lead (IV) bromide7. Sn3P4

8. chromium (III) chloride

Homework

Week 7 Homework #

Mixed Practice

With your partner, complete the worksheet.

Hints: If the anion ends in “-ide” it is an

ionic compound with two elements. If the anion ends in “-ate” or “-ite” the

compound includes a polyatomic ion. If the compound includes a transition

metal (Fe, Cu, Sn, Pb…), use the stock system.

Review Answers to Worksheet

Homework

Week 7 Homework #

Documents

18 Oct. 2010