18 oct. 2010 take out homework: week 6 homework #6- 9 and class work from friday objective: swbat...
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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-
Objective: SWBAT model atomic structure and relate valence shell electrons to trends on the periodic table.
How many TOTAL electrons does an atom of Lithium (Li) have?
1 2 3 4
25% 25%25%25%1. 22. 13. 34. 7
Objective: SWBAT model atomic structure and relate valence shell electrons to trends on the periodic table.
How many TOTAL electrons does an atom of Magnesium (Mg) have?
1 2 3 4
25% 25%25%25%1. 22. 33. 124. 24
Objective: SWBAT model atomic structure and relate valence shell electrons to trends on the periodic table.
How many TOTAL electrons does an atom of Chlorine (Cl) have?
1 2 3 4
25% 25%25%25%1. 22. 73. 174. 35
Objective: SWBAT model atomic structure and relate valence shell electrons to trends on the periodic table.
How many VALENCE electrons does an atom of Lithium (Li) have?
1 2 3 4
25% 25%25%25%1. 12. 23. 34. 7
Objective: SWBAT model atomic structure and relate valence shell electrons to trends on the periodic table.
How many VALENCE electrons does an atom of Magnesium (Mg) have?
1 2 3 4
25% 25%25%25%1. 22. 33. 124. 24
Objective: SWBAT model atomic structure and relate valence shell electrons to trends on the periodic table.
How many VALENCE electrons does an atom of Chlorine (Cl) have?
1 2 3 4
25% 25%25%25%1. 22. 73. 174. 35
Objective: SWBAT model atomic structure and relate valence shell electrons to trends on the periodic table.
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
Objective: SWBAT model atomic structure and relate valence shell electrons to trends on the periodic table.
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
Objective: SWBAT model atomic structure and relate valence shell electrons to trends on the periodic table.
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
Objective: SWBAT model atomic structure and relate valence shell electrons to trends on the periodic table.
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
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-
Objective: SWBAT model atomic structure and relate valence shell electrons to trends on the periodic table.
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-
Objective: SWBAT model atomic structure and relate valence shell electrons to trends on the periodic table.
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-
Objective: SWBAT model atomic structure and relate valence shell electrons to trends on the periodic table.
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
Objective: SWBAT model atomic structure and relate valence shell electrons to trends on the periodic table.
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
Objective: SWBAT model atomic structure and relate valence shell electrons to trends on the periodic table.
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
SWBAT model ionic bonding and write names and formulas for ionic compounds
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-
SWBAT model ionic bonding and write names and formulas for ionic compounds
Illustrating ionic bonding
Dot Structures – show the element symbol with the valence electrons surrounding it on 4 sides
F Li
SWBAT model ionic bonding and write names and formulas for ionic compounds
Ionic Bonding Demo with marbles
SWBAT model ionic bonding and write names and formulas for ionic compounds
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
SWBAT model ionic bonding and write names and formulas for ionic compounds
Practice Naming Ionic Compounds
1. CaF2
2. BeO3. Li2O
4. KBr5. Rb2S
6. Al2O3
7. SrCl2
8. MgO
SWBAT model ionic bonding and write names and formulas for ionic compounds
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
Objective: SWBAT model atomic structure and relate valence shell electrons to trends on the periodic table.
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
SWBAT model ionic bonding and write names and formulas for ionic compounds
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 #