1. Section 6.3 – Naming Compounds and Writing Formulas
Key Concepts
What information do the name and formula of an ionic compound provide?
What information do the name and formula of a molecular compound provide?
Vocabulary
Polyatomic ion

2. Reasoning
There are a number of compounds that have multiple common names
Example: Lime (also known as quicklime or unslaked lime)
Easier if there’s an agreed upon name to make it unambiguous
Example: Calcium Oxide (CaO)

3. Describing Ionic Compounds
The name of an ionic compound must distinguish it from other ionic compounds containing the same elements.
The formula of an ionic compound describes the ratio of the ions in the compound.

4. Binary Ionic Compounds
Compound made from 2 elements
Relatively simple: name of the cation and the name of the anion, except use part of the anion name plus –ide
Examples:
NaCl CaO CaBr2

5. Metals with Multiple Ions
For many transition metals, there are more than one type of ion that can form from them
Typically Roman numerals are used to designate the ion that forms
Example: Cu2(I)O vs Cu(II)O

6. Polyatomic Ions
Sometimes atoms form compounds with a net charge on them
A covalently bonded group of atoms that has a net charge and acts as a unit is a polyatomic ion
Examples:
Hydroxide (OH-) Acetate (C2H3O2-)

7. Describing Molecular Compounds
Like ionic compounds, molecular compounds have names that identify specific compounds and formulas that match those names
The name and formula of a molecular compound describe the type and number of atoms in a molecule of the compound.
Examples:
Carbon Dioxide Uranium Tetrafluoride

8. 6.3 Review 1) What does the formula of an ionic compound describe?
2) What do the name and formula of a molecular compound describe?
3) What suffix is used to indicate an anion?
4) Why are Roman numerals used in the names of compounds that contain transition metals?
5) What is a polyatomic ion?

9. Section 6.4 – The Structure of Metals
Key Concepts
What are the forces that give a metal its structure as a solid?
How do metallic bonds produce some of the typical properties of metals?
How are the properties of alloys controlled?
Vocabulary
Metallic bond
Alloy

10. Metallic Bonds
Metal atoms achieve stable electron configurations by losing electrons.
But if there aren’t any other elements around, metals can’t get rid of them
Instead, they can gain and lose electrons at the same time – valence electrons are able to move among the atoms
Essentially, the metal atoms become cations surround by a pool of shared electrons
A metallic bond is the attraction between a metal cation and the shared electrons that surround it.

11. Metallic Bonds
The cations in a metal form a lattice that is held in place by strong metallic bonds between the cations and the surrounding valence electrons
Some metals have stronger metallic bonds than others
Example: Sodium vs Tungsten

12. Explaining the Properties of Metals
The structure within a metal affects the properties of metals.
The mobility of electrons within a metal lattice explains some of the properties of metals.
Examples: Malleability and Conductivity

13. Alloys
An alloy is a mixture of two or more elements, at least one of which is a metal
Alloys have the characteristic properties of metals
Scientists can design alloys with specific properties by varying the types and amounts of elements in an alloy.

14. Alloys (Examples) Gold Copper Purity measured in karats
Often Mixed with silver, copper, nickel or zinc
Copper
Bronze vs Brass

15. Alloys (More Examples)
Steel
Alloy of Iron containing small amounts of carbon, chromium (stainless steel)
Other Alloys
Aluminum magnesium for airplanes

16. 6.4 Review - Exit Ticket
What are the forces that give a metal its structure as a solid?
How do metallic bonds produce some of the typical properties of metals?
How are the properties of alloys controlled?
Explain why the metallic bonds in some metals are stronger than the bonds in other metals.
Why are metals good conductors of electric current?
How does adding carbon to steel make the steel harder and stronger?