CHEM 121 Chapter 3 1. Draw the Lewis Structures for each of the following neutral atoms: Cs Na F Ar...
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Transcript of CHEM 121 Chapter 3 1. Draw the Lewis Structures for each of the following neutral atoms: Cs Na F Ar...
![Page 1: CHEM 121 Chapter 3 1. Draw the Lewis Structures for each of the following neutral atoms: Cs Na F Ar 2 3-minute review.](https://reader035.fdocuments.in/reader035/viewer/2022062720/56649f125503460f94c25ae1/html5/thumbnails/1.jpg)
CHEM 121
Chapter 3
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Draw the Lewis Structures for each of the following neutral atoms:
• Cs
• Na
• F
• Ar
2
3-minute review
![Page 3: CHEM 121 Chapter 3 1. Draw the Lewis Structures for each of the following neutral atoms: Cs Na F Ar 2 3-minute review.](https://reader035.fdocuments.in/reader035/viewer/2022062720/56649f125503460f94c25ae1/html5/thumbnails/3.jpg)
Reactivity of Elements
Compounds form so each atom can have a
Ionic compound:
Covalent compound:
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• Metals• •
• Nonmetals• • •
-
Ions: charged particles
+
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Predict whether these bonds in these molecules are ionic or covalent
• Br2
• CaO
• MgCl2
• NO2
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3-minute review
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Elements• Elements ordered by atomic number• “Periodic” trends• Periodic table by Mendeleev (1871)
1A 2A
3B 4B 5B 6B 7B 8B 1B 2B
3A 4A 5A 6A 7A
8A
Ionic Charge
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Predict the most common ion for each of these:
• O
• I
• S
• Mg
• Cs
• Al
• N
3-minute review
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Electron ConfigurationsFor ions:1.
2.
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Ex. O2-
Ex. Al3+
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Common ions in the body
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Ionic Compounds
Cation + Anion +
Strontium and Iodine
Nitrogen and Cesium
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Write the name for the compound that forms between the following pairs of elements:
• Sodium and fluorine
• Bromine and calcium
• Sodium and sulfur
• Sulfur and magnesium
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3-minute review
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Ionic Compounds
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•
•
•
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Ionic Compounds
• Net ionic charge
• Examples:• Potassium chloride
• Calcium bromide
• Magnesium sulfide
• Lithium oxide
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Write the formula for the following compounds:
Sodium bromide
Magnesium chloride
Potassium sulfide
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3-minute review
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Metals that form more than one ion
• Usually in B groups (transition metals)• Ex. Iron
chromium
copper gold iron lead tin
Cr2+ Cu+ Au+ Fe2+ Pb2+ Sn2+
Cr3+ Cu2+ Au3+ Fe3+ Pb4+ Sn4+
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Write the name for AuN
Write the formula for the following compounds:
Copper (II) iodide
Chromium (III) sulfide
Lead (IV) oxide
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3-minute review
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Properties of Ionic Compounds
•
•
•
•
•
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+ + + +-- -
+ + + +-- -
-
-+ + + +
-- -
+ + + +-- -
-
-
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Polyatomic IonsMonatomic Ions: Cl- Na+
Polyatomic ions:
Examples:
See Table 3.5 in your book
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Polyatomic Ions
• Nitrate: charge =
• Sulfate: charge =
Examples:
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Name the following:
• Al(OH)3
• NaNO3
• KNO2
• MgSO4
3-minute review
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