Class Blog 09/20/2013

PERIOD 4 HONORS CHEM CLASS 09/20/2013

The beginning of Period 4

In the beginning of class there were handouts on Classification of Elements.

First we went over the Ionic Bonding Chart handout that we got the other day in class.

Some major ideas that were brought up during the discussion were:

- Polyatomic ion Cyanide and Hydroxide are the only polyatomics that end in -ide

- Metals are never negative  

- How to make a compound neutral is by making sure the charges cancel out

Notes:

You can find the notes taken on Moodle to paste into your journal!

Properties of the Periodic Table Groups

Alkali Metals Alkaline Earth Metals

- Group 1 - Group 2

- +1 ions - +2 Ions

- Most reactive metals - Reactive Metals

Transition Metals Halogens

- Groups 3-12 - Group 17

- A Variety of ions - -1 Ions

- Use Roman Numerals when - Most reactive nonmetals

naming structural metals

Noble Gases Inner Transitions    

- Group 18 - supposed to slide in with

- NO IONS! (No charge!) the transition metals

- Used in “neon” lighting. - Aka Lanthanides and
Actinides

aka “Rare Earths”

- Group along the bottom

Naming Acids Handout

- Refer to the handout as you read these notes

- You can find this handout on Moodle under Unit 2

*Naming acid is going to be on the quiz (1 question or so)*

Patterns we see in the first column of names of the acids:

- They contain a single element anion (Cl⁻, Br⁻)

- Their names end in “-ic”

- Start with “hydro-”

- They do not contain oxygen

Patterns of the names of the acids in second and third column:

- The ones with more oxygens end with “-ic”

- The ones with fewer oxygens end with an “-ous”

To determine if a compound is an acid it must be in water and must start with “hydro” (H)

Acids that DO not contain the element oxygen have the prefix “hydro” in the front and the ending of the anion has to be changed to “-ic”

Acids that DO NOT contain the element oxygen:

If the anion ends with “-ate”, the ending of the acid is changed to “-ic”

If the ending of the anion is “-ite”, it has to be changed to “-ous”

Examples:

HF = Hydrofluoric Acid

H₂CO₃ = Carbonic Acid

HCIO₂ = Chlorous Acid

Naming Covalent Compounds Handout

Prefixes:

Mono - 1, Di - 2, Tri - 3, Tetra - 4, Penta - 5, Hexa - 6, Hepta - 7, Octa - 8, Nona - 9, Deka - 10

Some major notes:

- If you see a metal it’s IONIC.

- If you see no metals, and no ammonium, it is COVALENT

- The first element named in each compound is a nonmetal

- The second element named in each compound is a nonmetal

- The bonding holding these two compounds together is covalent (aka molecular)

RULE FOR NAMING COVALENT COMPOUNDS

Say the name of the first element and a prefix that says how many there are. Then say a prefix and name of the second element. End with and “-ide”

Example:

SiO₂ = Silicon Dioxide

HOMEWORK!

1.) Names and Formulas of Ionic Compound handout due Monday

2.) Classification of Elements also due Monday

3.) Naming Practice handout due Monday

4.) Three ChemThinks - Take notes on the tutorials and answer questions (12 Points for completion online and 3 points for notes)   

Take notes on:

- Ionic Bonding

- Ionic Formulas

- Covalent bonding

5.) Quiz on Monday - Everything we talked about starting from unit two until now is fair game!

Our next blogger will be....

Frankie Sulejmani!!!!! :)