1. THE NATURE OF SOLIDS SECTION 10.3 After reading Section 10.3, you should know: properties of solids the difference between single-cubic, body- centered cubic and face-centered cubic crystalline structures the definition of an allotropes and amorphous solids

2. Solids  Melting Point (mp) - temperature at which a solid turns into a liquid  Ionic compounds (metal + nonmetal) have high melting points  this is due to their crystalline structure

3. Crystal Structures  Crystal shape depends on arrangement of particles (pg 282) – Simple Cubic: – Body-Centered Cubic: – Face-Centered Cubic:

4.  Two or more different molecular forms of the same element in the same physical state  Examples  Carbon can exist as diamond, graphite or buckyball  The properties of these carbon molecules are very different because of their crystalline structures Allotropes

5. Amorphous Solids  Lack an ordered internal structure; the atoms are randomly arranged  Example – glass  Structure is in between a crystalline solid and a free- flowing liquid

6. After reading Section 10.3, you should know: properties of solids the difference between single-cubic, body- centered cubic and face-centered cubic crystalline structures the definition of an allotropes and amorphous solids