1. The Structure of Metals
Chapter 6 Section 4 Pg

2. Metallic Bonds
Metal atoms achieve stable electron configurations by ______ electrons.
There is a way for metal atoms to lose and gain electrons at the ____ time.
In metals: valence electrons are free to move among the atoms
In effect: metal atoms become cations surrounded by a pool of shared electrons
Metallic bond- the __________ between a metal cation and the shared electrons that surround it

3. Metallic Bonds
The _______ in a metal form a lattice that is held in place by strong metallic bonds between the cations and the surrounding valence electrons.
Although the electrons are ______ among the atoms, the total number of electrons does not change
Overall, metal is _______

4. Metallic Bonds
The ____ valence electrons an atom can contribute to the share pool, the stronger the metallic bonds will be.
Bonds in alkali metal are relatively _____ because alkali metals contribute only 1 valence electron (reason for being soft, and low melting point)
__________ metals have more valence electrons to contribute, therefore are harder and have higher melting points

5. Explaining Properties of Metals
The ________ of electrons within a metal lattice explains some of the properties of metals.
Ability to conduct electric current and malleability
Metal has a built-in supply of _______ particles that can flow from one location to another- the pool of electrons
Recall that a flow of charged particles is an electric current
________ bonds also explain why metals can be drawn into thin wires (ductile) without breaking.

6. Alloys
Alloy- mixture of 2 or more elements, at least ___ of which is a metal
______ have characteristic properties of metals
Example: gold jewelry- often mixed with harder metals (zinc, nickel, silver, etc.) to be more resistant to wear

7. Alloys
Copper Alloys
1st important alloy was ______ (associated with era in history- the Bronze Age)
Bronze contains only copper and tin, which are relatively soft metals, but when mixed together, the metals are much ______ and stronger than either alone
Bronze is hard, durable, used in statues, propellers
Scientists can design alloys with specific properties by varying the types and amounts of elements in an _____

8. Alloys
Copper Alloys
_____: contains only copper and zinc; softer than bronze and easier to shape
Brass is also shinier than ______, but likely to weather more quickly

9. Alloys Steel Alloys Alloy of ____ that contains carbon
Stainless steel: ________ and very little carbon, more brittle than other steels that contain more ______

10. Alloys
Other Alloys
If a _____ amount of copper or manganese is added to _________, the result is a stronger material that is still lighter than steel.