Transcript 18 Oct. 2010 - PHA Science

18 Oct. 2010
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Take out Homework: Week 6 Homework #69 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
Do now, homework check
II. Review from last week
III. Clicker “quiz” (counts as classwork
grade)
IV. Hand back papers and progress reports
Homework: none
I.
Review from last week
Ions formed by group - Add to your PTE
1
8
1+
2
3+
3
2+
Lose
e-
Cations
Objective: SWBAT model atomic structure and relate valence shell
electrons to trends on the periodic table.
4
35
26
17
Gain
e
Anions
How many TOTAL electrons does an
atom of Lithium (Li) have?
1.
2.
3.
4.
2
1
3
7
25%
Objective: SWBAT model atomic structure and relate valence shell
1
electrons to trends on the periodic table.
25%
25%
2
3
25%
4
How many TOTAL electrons does an
atom of Magnesium (Mg) have?
1.
2.
3.
4.
2
3
12
24
25%
Objective: SWBAT model atomic structure and relate valence shell
1
electrons to trends on the periodic table.
25%
25%
2
3
25%
4
How many TOTAL electrons does an
atom of Chlorine (Cl) have?
1.
2.
3.
4.
2
7
17
35
25%
Objective: SWBAT model atomic structure and relate valence shell
1
electrons to trends on the periodic table.
25%
25%
2
3
25%
4
How many VALENCE electrons does an
atom of Lithium (Li) have?
1.
2.
3.
4.
1
2
3
7
25%
Objective: SWBAT model atomic structure and relate valence shell
1
electrons to trends on the periodic table.
25%
25%
2
3
25%
4
How many VALENCE electrons does an
atom of Magnesium (Mg) have?
1.
2.
3.
4.
2
3
12
24
25%
Objective: SWBAT model atomic structure and relate valence shell
1
electrons to trends on the periodic table.
25%
25%
2
3
25%
4
How many VALENCE electrons does an
atom of Chlorine (Cl) have?
1.
2.
3.
4.
2
7
17
35
25%
Objective: SWBAT model atomic structure and relate valence shell
1
electrons to trends on the periodic table.
25%
25%
2
3
25%
4
Since Chlorine has 7 valence electrons,
to satisfy the octet rule, it must:
1.
2.
3.
4.
Do nothing
Gain one electron
Lose one electron
Lose 7 electrons
25%
Objective: SWBAT model atomic structure and relate valence shell
1
electrons to trends on the periodic table.
25%
25%
2
3
25%
4
Since Lithium has 1 valence electron, to
satisfy the octet rule, it must:
1.
2.
3.
4.
Do nothing
Gain one electron
Lose one electron
Gain 7 electrons
25%
Objective: SWBAT model atomic structure and relate valence shell
1
electrons to trends on the periodic table.
25%
25%
2
3
25%
4
Since Magnesium has 2 valence electrons,
to satisfy the octet rule it must:
1.
2.
3.
4.
Do nothing
Gain 2 electrons
Lose 2 electrons
Gain 6 electrons
25%
Objective: SWBAT model atomic structure and relate valence shell
1
electrons to trends on the periodic table.
25%
25%
2
3
25%
4
Since neon (Ne) has 8 valence electrons,
to satisfy the octet rule it must:
1.
2.
3.
4.
Do nothing
Gain 2 electrons
Lose 8 electrons
Gain 8 electrons
25%
Objective: SWBAT model atomic structure and relate valence shell
1
electrons to trends on the periodic table.
25%
25%
2
3
25%
4
Ions formed by group - Add to your PTE
1
8
1+
2
3+
3
2+
Lose
e-
Cations
Objective: SWBAT model atomic structure and relate valence shell
electrons to trends on the periodic table.
4
35
26
17
Gain
e
Anions
What is the correct symbol for a Lithium ion?
1.
2.
3.
4.
Li+
LiLi2+
Li2-
25%
Objective: SWBAT model atomic structure and relate valence shell
1
electrons to trends on the periodic table.
25%
25%
2
3
25%
4
What is the correct symbol for a
Magnesium ion?
1.
2.
3.
4.
Mg+
MgMg2+
Mg2-
25%
Objective: SWBAT model atomic structure and relate valence shell
1
electrons to trends on the periodic table.
25%
25%
2
3
25%
4
Which of the following pairings is correct?
1.
2.
3.
4.
5.
Magnesium/Cation
Chlorine/Anion
Lithium/Cation
Sulfur/Anion
All of the above
20%
20%
Objective: SWBAT model atomic structure and relate valence shell
1
2
electrons to trends on the periodic table.
20%
3
20%
4
20%
5
What is the name of the ion formed
from the element Fluorine?
1.
2.
3.
4.
Fluorine
Fluorate
Fluorite
Fluoride
25%
Objective: SWBAT model atomic structure and relate valence shell
1
electrons to trends on the periodic table.
25%
25%
2
3
25%
4
What is the name of the ion formed
from the element Lithium?
1.
2.
3.
4.
Lithium
Lithiate
Lithite
Lithide
25%
Objective: SWBAT model atomic structure and relate valence shell
1
electrons to trends on the periodic table.
25%
25%
2
3
25%
4
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!!
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Draw a picture of one atom of sulfur. Draw an arrow
showing the valence shell. Answer the questions to the
right.
1.
2.
3.
4.
5.
Total number of electrons: ___________
Number of valence electrons: ___________
Gain or lose electrons to form a full valence shell? ________
How many will it gain or lose? ______
Symbol with charge: _________
Agenda
Do now
II.
Ionic bonding notes
III. Naming compounds practice
IV. Ionic bonding modeling
V.
Writing formulas practice
VI. Ionic bonding “Speed Dating”
Homework: Finish Week 6 Homework
I.
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!!
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Draw a picture of one atom of sulfur. Draw an arrow
showing the valence shell. Answer the questions to the
right.
1.
2.
3.
4.
5.
Total number of electrons: ___________
Number of valence electrons: ___________
Gain or lose electrons to form a full valence shell? ________
How many will it gain or lose? ______
Symbol with charge: _________
Agenda
Do now
II.
Ionic bonding notes
III. Naming compounds practice
IV. Ionic bonding modeling
V.
Writing formulas practice
Homework: Finish Week 6 Homework
I.
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
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 The
oppositely charged ions are attracted to one
another (electrostatic attraction)
 this causes them to become bonded together
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Ions will transfer electrons (and bond) so that
they both get 8 valence eSWBAT model ionic bonding and write names and formulas for ionic compounds
Illustrating ionic bonding
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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
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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 chloride
2. CaO
3. sodium sulfide
4. AlBr3
5. aluminum iodide
Agenda
Do now
II. Homework check
III. Review writing names and formulas for
ionic compounds
IV. Ionic bonding “Speed Dating”
Homework: Revise your Week 6 Homework
I.
Naming ionic compounds
Write the cation name
 Name of the element
 Write the anion name
 Beginning of element name + -ide
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Ex 1: LiCl
 Ex 2: Al2O3
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SWBAT model ionic bonding and write names and formulas for ionic compounds
Practice Naming Ionic Compounds
1.
2.
3.
4.
5.
6.
7.
8.
CaF2
BeO
Li2O
KBr
Rb2S
Al2O3
SrCl2
MgO
SWBAT model ionic bonding and write names and formulas for ionic compounds
Writing Formulas for Ionic Compounds
Write each ion symbol with the charge
2. “Cross” the charges down to the bottom
of the opposite element
3. Rewrite symbols with subscripts
1. Do not write + or –
Example: Ex 1: lithium chloride
Ex 2: aluminum oxide
Ex 3: lithium sulfide
1.
Writing formulas from names
1.
2.
3.
4.
5.
6.
7.
8.
potassium chloride
magnesium bromide
rubidium sulfide
beryllium fluoride
sodium oxide
magnesium sulfide
aluminum oxide
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!
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Objective: SWBAT model atomic structure and relate valence shell
electrons to trends on the periodic table.

Share out results of “speed dating”
Homework
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Revise Week 6 Homework
SWBAT model ionic bonding and write names and formulas for ionic compounds
A: 21 Oct. 2010
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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.
2.
3.
4.
5.
magnesium oxide
CaS
lithium oxide
AlF3
cesium sulfide
Agenda
Do now
II. Homework check: any remaining
questions?
III. Review of writing formulas from
compound names
IV. Compounds with polyatomic ions
Homework: Week 7 Homework #1-30
I.
So far, each ionic compound has had only
two elements.
 Can they have more than 2?
 yes!
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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 NO3
 OH
 SO42 CO32 PO43+
 NH4

nitrite
nitrate
hydroxide
sulfate
carbonate
phosphate
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
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
1.
Writing Formulas
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1.
2.
3.
4.
5.
6.
7.
8.
Write formulas for the following ionic
compounds:
sodium nitrite
sodium nitrate
magnesium sulfate
aluminum carbonate
calcium hydroxide
ammonium oxide
ammonium chloride
magnesium nitrate
Homework
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Week 7 Homework #1-30
C: 22 Oct. 2010
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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.
2.
3.
4.
5.
magnesium nitrate
CaSO4
lithium hydroxide
AlPO4
ammonium iodide
Agenda
Do now
II. Homework check
III. Stock system: Names and formulas
IV. Mixed practice: Writing names and
formulas of ANY ionic compound!
Homework: Week 7 Homework #
I.
A: 22 Oct. 2010
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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.
2.
3.
4.
5.
magnesium nitrate
CaSO4
lithium hydroxide
AlPO4
ammonium iodide
Agenda
Do now
II. Homework check
III. Stock system: Names and formulas
Homework: Week 7 Homework #
I.
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

1.
2.
3.
4.
5.
6.
7.
8.
Write the names or formulas for the following
ionic compounds using the stock system
CuI2
lead (II) sulfide
CuBr2
iron (II) chloride
SnO
lead (IV) bromide
Sn3P4
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 #