3. Metals – elements that are good conductors.
They also generally have high tensile
strength, luster, high malleability, and are
ductile.
Non-Metals – A poor conductor of heat and
electricity.
4. Pick an Element
Gas, Liquid, or Solid
Describe its general characteristics
-include melting point, boiling point freezing
point (if there is one)
Describe if it is a metal, non-metal, or
metalloid
Toxic or non-toxic?
Describe 3 uses of this element
Editor's Notes
This is the periodic table, there is also one on the wall over there. The periodic table is the single most important thing we will learn in this class. It is the ultimate reference, though some of these you may be expected to memorize later, and some you will use so much you memorize automatically.
Each square in the periodic table represents an element. Some of the elements follow their english names, while some follow their latin origin. For example, silver is Ag, because in latin, argentum. Has anyone here read eragon? If no then don’t explain Well, it is a very good book, and eragon is called argetlam which means silverhand, it helped me to remember ag is silver because it is argentum.
The periodic table is divided into columns, the vertical rows, and periods, the horizontal rows. The groups all contain elements with similar chemical properties. In the groups 1,2,13,14,15,16,17, and 18, they are categorized in addition to similar chemical properties, by the number of valence electrons – or electrons in their outer shell. You can file that info away for later, we will go over valence electrons in later chapters, but it is good to remember it for now.
The horizontal rows of elements are called periods. The physical and chemical properites change regularly across a period. Elements closer together tend to be similar than those farther apart, makes sense.
The two sets below make up the lanthanide and actinide series. They won’t be super important as we go along, but they are on the bottom basically for logistical reasoning. They don’t really fit into the periodic table
Have objects to pass around the room – tin foil, pennies, nickel, cut wire (rec center)
Metals are generally shiny elements (show tin foil, pennies (copper) nickel), they can be good conductors,
What does it mean to be a good conductor?
It means that certain energies can pass through that element easy. In this case, electricity and heat
Let us look at some of those possibly unfamiliar descriptors.
What do we think high tensility is?
It is the ability to resist breaking when pulled
Luster?
Shine
Malleability
If we say something is malleable, it is possible to work with to change its shape. Take clay, clay is easily molded. It is malleable. In this case, metals can be rolled into sheets or hammered into shape
Ductile
The ability to drawn into a fine wire.
