ION QUIZ. Today you will need your periodic table/ion sheet and your packet Warmup (3 minutes)...
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Transcript of ION QUIZ. Today you will need your periodic table/ion sheet and your packet Warmup (3 minutes)...
![Page 1: ION QUIZ. Today you will need your periodic table/ion sheet and your packet Warmup (3 minutes) 1.What is a valence electron? 2.Draw the Lewis dot structures.](https://reader035.fdocuments.in/reader035/viewer/2022070323/56649e185503460f94b04e70/html5/thumbnails/1.jpg)
ION QUIZ
![Page 2: ION QUIZ. Today you will need your periodic table/ion sheet and your packet Warmup (3 minutes) 1.What is a valence electron? 2.Draw the Lewis dot structures.](https://reader035.fdocuments.in/reader035/viewer/2022070323/56649e185503460f94b04e70/html5/thumbnails/2.jpg)
Today you will need your periodic table/ion sheet and your packet
Warmup (3 minutes)
1. What is a valence electron?2. Draw the Lewis dot structures of
magnesium and fluorine.3. What does the term “neutral” mean
(in terms of math and science)?
![Page 3: ION QUIZ. Today you will need your periodic table/ion sheet and your packet Warmup (3 minutes) 1.What is a valence electron? 2.Draw the Lewis dot structures.](https://reader035.fdocuments.in/reader035/viewer/2022070323/56649e185503460f94b04e70/html5/thumbnails/3.jpg)
Is the red guy a cation or an anion?
Is the red guy a metal or a nonmetal?
Chemistry puts the "cation" in education. What's a cation afraid of?
A dogion!
![Page 4: ION QUIZ. Today you will need your periodic table/ion sheet and your packet Warmup (3 minutes) 1.What is a valence electron? 2.Draw the Lewis dot structures.](https://reader035.fdocuments.in/reader035/viewer/2022070323/56649e185503460f94b04e70/html5/thumbnails/4.jpg)
Metal atoms lose e- to form positive ions called cations:
K+
Ca 2+
NH4+
Nonmetal atoms gain e- to form negative ions called anions:
Cl-
S2-
CO32-
Mg2+
Superscript written to the upper right shows the charge
F-
If the charge is +1 or -1, you don’t have to include the “1”
Called an “oxidation number”
Ion: An atom (or group of atoms) that has lost or gained e- to follow the Octet Rule and is now electrically charged
![Page 5: ION QUIZ. Today you will need your periodic table/ion sheet and your packet Warmup (3 minutes) 1.What is a valence electron? 2.Draw the Lewis dot structures.](https://reader035.fdocuments.in/reader035/viewer/2022070323/56649e185503460f94b04e70/html5/thumbnails/5.jpg)
IonizationF + e- F-
Neutral but unstable fluorine atom, F
Write the (oxidation) equation showing how magnesium becomes an ion
Same # electrons as neon, but NOT an atom of neon!
Mg Mg2+ + 2e-
Same # e- as…which element?
Write the (reduction) equation showing how flourine becomes an ion
![Page 6: ION QUIZ. Today you will need your periodic table/ion sheet and your packet Warmup (3 minutes) 1.What is a valence electron? 2.Draw the Lewis dot structures.](https://reader035.fdocuments.in/reader035/viewer/2022070323/56649e185503460f94b04e70/html5/thumbnails/6.jpg)
1A metals: +1 ions 2A metals: +2 ions
7A nonmetals: -1 ions 6A nonmetals: -2 ions
What patterns do you see? Are there any exceptions to
these patterns?
![Page 7: ION QUIZ. Today you will need your periodic table/ion sheet and your packet Warmup (3 minutes) 1.What is a valence electron? 2.Draw the Lewis dot structures.](https://reader035.fdocuments.in/reader035/viewer/2022070323/56649e185503460f94b04e70/html5/thumbnails/7.jpg)
Special ions(refer to handout)
Some transition metals lose different numbers of electrons when they become ions
They can have different charges as a cation, and must be written with roman numerals representing their charge (exception: Al3+)
Examples?
Polyatomic ions: group of more than one atoms with a charge (+ or -)
Example: Why do chemists like nitrates so much?
They're cheaper than day rates.
![Page 8: ION QUIZ. Today you will need your periodic table/ion sheet and your packet Warmup (3 minutes) 1.What is a valence electron? 2.Draw the Lewis dot structures.](https://reader035.fdocuments.in/reader035/viewer/2022070323/56649e185503460f94b04e70/html5/thumbnails/8.jpg)
Nonmetal atoms remove e- from metal atoms.
Ionic Bonds
The two atoms become oppositely charged ions that attract each other, resulting in an ionic bond. An ionic compound forms.
Na+
Cl-
Read through EX 1 on “Writing and Naming Ionic Compounds” Handout that shows the crisscross method.
![Page 9: ION QUIZ. Today you will need your periodic table/ion sheet and your packet Warmup (3 minutes) 1.What is a valence electron? 2.Draw the Lewis dot structures.](https://reader035.fdocuments.in/reader035/viewer/2022070323/56649e185503460f94b04e70/html5/thumbnails/9.jpg)
EX 2: Write the formula for the ionic compound calcium oxideStep 1: Write each ion with the correct charge. Look at periodic table group or cheat sheet for help. Ca2+ O2-
Step 2: “Criss-cross” number associated with each charge (do not include the + or -) Ca2O2
Step 3: Remove any subscripts of 1. Eliminate both subscripts if they are the same. Write the formula.CaO
EX 3: Write the formula for the ionic compound aluminum carbonate
Al3+ CO32-
Al2CO33 ????
Al2(CO3)3
another example: iron(II)phosphateFe2+ PO4
3-
Fe2(PO4)3 NOOOOOOO!
Fe3(PO4)2
![Page 10: ION QUIZ. Today you will need your periodic table/ion sheet and your packet Warmup (3 minutes) 1.What is a valence electron? 2.Draw the Lewis dot structures.](https://reader035.fdocuments.in/reader035/viewer/2022070323/56649e185503460f94b04e70/html5/thumbnails/10.jpg)
Fe 2+ PO43-
Fe 2+
Fe 2+
PO43-
Fe 2+
PO43-
Fe 2+
Fe 2+
PO43-
Fe 2+
PO43-
Fe 2+Fe 2+
PO43-
6+6-
Ionic compounds aren’t present as individual molecules, they exist as large crystals with many many of the same ions. The subscripts show the RATIOS of the two ions --- one formula unit of this compound has 3 iron(II)’s and 2 phosphates.
3:2 is simplified from 6:4
or 30,000:20,000
![Page 11: ION QUIZ. Today you will need your periodic table/ion sheet and your packet Warmup (3 minutes) 1.What is a valence electron? 2.Draw the Lewis dot structures.](https://reader035.fdocuments.in/reader035/viewer/2022070323/56649e185503460f94b04e70/html5/thumbnails/11.jpg)
Name Formula
potassium nitride
copper (I) bromide
potassium phosphide
magnesium fluoride
K3N
CuBr
K3P
MgF2
![Page 12: ION QUIZ. Today you will need your periodic table/ion sheet and your packet Warmup (3 minutes) 1.What is a valence electron? 2.Draw the Lewis dot structures.](https://reader035.fdocuments.in/reader035/viewer/2022070323/56649e185503460f94b04e70/html5/thumbnails/12.jpg)
Name these 2 compounds:CoSa.Figure out which ions
form the compound because the ion charge could be important.
Since S forms S2-, Co must be Co2+
b. Name the ions, cation first, then anion
c. Change ending to –ide if it’s a pure element.
cobalt (II)sulfide
d. Transition metals always get a roman numeral to indicate their charge!
Na2SO3
sodium sulfiteCommon mistakes:sodium(II)sulfitesodium(I)sulfitesodium sulfide/sulfate
![Page 13: ION QUIZ. Today you will need your periodic table/ion sheet and your packet Warmup (3 minutes) 1.What is a valence electron? 2.Draw the Lewis dot structures.](https://reader035.fdocuments.in/reader035/viewer/2022070323/56649e185503460f94b04e70/html5/thumbnails/13.jpg)
Formula NameNa2O
CuS
LiBr
CuCl
Sodium Oxide
Copper (II) Sulfide
Lithium Bromide
Copper (I) Chloride
![Page 14: ION QUIZ. Today you will need your periodic table/ion sheet and your packet Warmup (3 minutes) 1.What is a valence electron? 2.Draw the Lewis dot structures.](https://reader035.fdocuments.in/reader035/viewer/2022070323/56649e185503460f94b04e70/html5/thumbnails/14.jpg)
Name Formula
Ammonium Phosphate
Iron (II) Nitrate
Sodium Sulfate
Silver Acetate
(NH4)3PO4
Fe(NO3)2
Na2SO4
AgC2H3O2
![Page 15: ION QUIZ. Today you will need your periodic table/ion sheet and your packet Warmup (3 minutes) 1.What is a valence electron? 2.Draw the Lewis dot structures.](https://reader035.fdocuments.in/reader035/viewer/2022070323/56649e185503460f94b04e70/html5/thumbnails/15.jpg)
Formula NameFe(OH)3
Mg(NO2)2
NiCO3
Cd(HCO3)2
Iron (III) Hydroxide
Magnesium Nitrite
Nickel (II) Carbonate
Cadmium (II) hydrogen carbonate
orCadmium (II) bicarbonate
![Page 16: ION QUIZ. Today you will need your periodic table/ion sheet and your packet Warmup (3 minutes) 1.What is a valence electron? 2.Draw the Lewis dot structures.](https://reader035.fdocuments.in/reader035/viewer/2022070323/56649e185503460f94b04e70/html5/thumbnails/16.jpg)
Name FormulaSodium Dichromate
Tin (II) Chromate
Magnesium Permanganate
lead (IV) bisulfate
Na2Cr2O7
SnCrO4
Mg(MnO4)2
Pb(HSO4)4
![Page 17: ION QUIZ. Today you will need your periodic table/ion sheet and your packet Warmup (3 minutes) 1.What is a valence electron? 2.Draw the Lewis dot structures.](https://reader035.fdocuments.in/reader035/viewer/2022070323/56649e185503460f94b04e70/html5/thumbnails/17.jpg)
Work on your packet!
Make sure you have the Precipitation Lab with you
next class!