chapter 15 notes, part ischools.misd.org/upload/template/6094/notes metallic...chemistry notes names...
TRANSCRIPT
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Chemistry Notes
Bonding in Metals
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Metallic Bonds
Metallic bonds consist of metal cations with a free-floating “sea of electrons”
This explains many physical properties—why metals are good conductors, and why they are malleable and ductile
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Malleablilty/Ductility
Ductile – the ability to be
drawn into wires
Malleable – the ability to be
hammered into shapes
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Malleablilty/Ductility
Metals display these characteristics because when subjected to pressure, cations can easily slide past one another (unlike ionic solids, which have very strong attractive and repulsive forces)
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Alloys
Most metals you use everyday
are a mixture of two or more
elements, for example brass,
bronze or steel. These are
called alloys.
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Alloys
The importance of alloys are
that often they have superior
properties than the elements
they are made of.
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Chemistry Notes
Names & Formulas
With Transition Metals
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Transition Metals
So far, we have only written names
and formulas using the
representative elements.
Transition metals are different
because they can become stable
with different oxidation numbers.
Ex) Iron can have a +2 or a +3
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Transition Metals
Since transition metals can have
more than one charge, it must be
designated in the name.
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Naming Ionic Compounds
We do this by putting the charge as a Roman numeral in parenthesis between the positive and negative ion.
Use the reverse criss cross method to determine what goes in parentheses.
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Naming Ionic Compounds
Example: FeCl3Iron (III) chloride
Example: FeCl2Iron (II) chloride
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Practice Problems
Name the following:
CoCl2Fe2O3
Cu2S
MgCl2HgBr2
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Practice Problems
Write the formula for the following: Iron (II) Fluoride
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Practice Problems
Write the formula for the following: Mercury (I) Sulfide
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Practice Problems
Write the formula for the following: Cobalt (II) Phosphide
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Practice Problems
Write the formula for the following: Chromium (II) Nitride