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11.8 Bonding in solids

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by

Cynthia Rafael

on 11 February 2014

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Transcript of 11.8 Bonding in solids

11.8 Bonding in solids
Molecular Crystals
Covalent-Network Crystals
Large networks= never ending chains by covalent bonds
Stronger bonds = harder solids
Higher melting points
What Are the Four types of Solids?
"And you thought a solid was a solid!"
Ionic Crystals
Metallic Crystals
Questions:
11.71- What kind of attractive forces exist between particles in
a) Molecular Crystals
b)Covalent-Network Crystals
c)Ionic Crystals
d)Metallic crystals
11.74-Which type (or types) of crystalline solid is characterized by each of the following:
a) high mobility of electrons through out the solid
b) softness, relatively low melting point
c) high melting point and poor electrical conductivity
d)network of covalent bonds
e) charged particles through the solid
Held together by ionic bonds
-The strength of the Ionic bond depends on the charges of the ions
High melting point
Forces: Electrostatic attractions
Form crystals; NaCl
Hard and brittle
Poor electricity conductors
Answers:
By Cynthia, Vanessa, Michelle
Weak forces (London dispersion, hydrogen bonds, and dipole-dipole forces)
soft solids
low melting points
gases and liquids @ room temp. form molecular solids
11.71
a) London dispersion forces, dipole-dipole forces, hydrogen bonds
b) Covalent bonds
c) Ionic bonds
d)Metallic bonds

11.74
a)
b)Molecular
c) Ionic and covalent
d) Covalent-network
e) Ionic
Body-centered cubic structures.
The strength of the bonding increases as the # of electrons available for bonding increases.
Forces: metallic bonds
variations in hardness and melting point
malleable and ductile
Conduct electricity
All metallic elements-Cu
Pg.464
I used to think that solids were the same
Until I opened up my book and said
What is this tragedy?
More stuff for my brain

I guess I never learned in 2nd grade
That there are more than two types of solids
but now I know ow ow there's really four

Molecular and covalent, Ionic and metallic
these are the four repeat them now
I want to hear you shout
Molecular and covalent, ionic and metallic
These are the four
now say them loud!

They all contain different forces
Metallic have metallic bonds
Ionic electrostatic attraction
Molecular has 3 different forces
dipole
London
And hydrogen bonds
Covalent-covalant bonds

Now let's talk about properties
Ionic and covalent have a high melting point
metallic varies

Molecular has a low one
Metallic and molecular are soft unlike
Ionic and covalent are very hard
Molecular and covelent, ionic have low electrical conduction
Except metallic

They all contain different forces
Metallic have metallic bonds
Ionic electrostatic attraction
Molecular has 3 different forces
Dipole
London
And hydrogen bonds
Covalent-covalent bonds
Full transcript