Basic Facts
What are the three types of bonds in crystals?
Ionic, covalent, and metallic
How do ionic crystals react to water?
They are highly soluble
How do covalent crystals react to water?
They don't dissolve
How well do metallic crystals conduct electricity?
They are good conductors
What type of bonds does Na have?
Metallic bonds
What determines a crystal's classification?
It's bond type
Ionic crystals consist of positively charged ______ and negatively charged _______
Cations and anions
How well do covalent crystals conduct electricity?
They don't conduct electricity
How many electrons are in a metal atom's outermost shell?
One, two, or three.
What type of bonds does NaCl have?
Ionic bonds
What is the definition of a crystal?
A highly ordered microscopic structure formed when a metal combines with another atom.
How well do ionic crystals conduct electricity?
Poorly. They don't conduct in a solid state, but can conduct when dissolved.
Covalent crystals form compounds through the bond of ___________________
What type of atoms form a metal crystal?
Positive ions that have lost their valence electrons
What type of bonds does SiO2 have?
Covalent bonds
What do the melting and boiling points of crystals have in common?
They are high
Ionic crystals form compounds through the bond of a metal with a ____________
Non-metal element
Covalent crystals form a __________________ network with a very large number of atoms.
three-dimensional
Why are metal crystals malleable?
The shared electrons allow metal atoms to slide over each other
What type of bonds does Au have?
What type of crystal are diamonds?
Covalent
Why does water break ionic bonds?
Due to the polarity of the water molecule.
In diamonds, how many electrons does each atom share?
Four
What happens to valence electrons in a metal crystal?
They form a sea of shared electrons
What type of bonds does KCl have?
Ionic bonds