Unit 2 Blog 9/ 18/13

What we did in class today September 18:

• We picked up 4 new pages at the beginning of class (Honors Chem -Review Groups/ Periods, Metal/Nonmetal/Metalloid, atomic structure,Ions,Isotopes), Honors Chem, Honors Chemistry Binary Ionic compounds: Name to Formula Using Crisscrossing, Honors Chemistry Polyatomic Ionic Compounds: Name to Formula Using Crisscrossing) 

• We went over answers to ChemThink the atomic structure worksheet. 

• We also went over "Holy Atom, Batman"

• We completed the Honors Chem - Review worksheet Groups/Periods, Metals/Nonmetals/Metalloid, Atomic Structure,Ions,Isotopes  
• We also started to take notes but we did not finish them

Answers to the Hnrs. Chem -Review:

1.) Mg   Magnesium                              8.)Ion
2.) K   Potassium                                  9.) Neutron 
3.) Ne   Neon                                       10.)Isotopes
4.) 17 neutrons                                      11.) NO I don't conduct                                                                                electricity

5.) Electron                                           12.) 3 protons

6.) Silicon                                             13.) 10.79 amu which is Boron
7.) 18 electrons

THE ANSWERS TO HOLY ATOM BATMAN AND CHEMTHINK- ATOMIC STRUCTURE ARE IN MOODLE!

TODAYS HW:

NONE !!! :)

But CONTINUE to work on the 4 webassigns even though it seems that webassign is still having problems!

NOTES ON FORMING IONIC COMPOUNDS:

MATTER 

MIXTURES                                            PURE SUBSTANCES

                                        ELEMENTS                   COMPOUNDS

                                                       Ionic    Molecular aka Covalent

Made of Ions (elements that have charge)

(+ and - stick together)

THERE ARE TWO KINDS OF IONS: BINARY AND POLYATOMIC

Cation: + ion, goes first (usually a metal)(NH with subscript of 4 is the exception) And usually have metals but sometimes not

"Cat Ion"

Anion: - Ion, goes second ( Always non- metal)

      "Ant Ion"

Binary Ionic Compound: One atom +, one atom -

EXAMPLE: NaCl

K (subscript 2) O

Al (subscript 2) S (subscript 3)

 SO HERE'S THE BIG QUESTION- How do you know what numbers go in the formulas?

-Charges Cancel Out!!!!

EX: K( +1) and F (-1)    Formula KF

Polyatomic- Groups of atoms that can have charge too!

CHARGES NEED TO BALANCE OUT WITH THESE TOO!!!
EX: POTASSIUM AND NITRATE ION

           K+            NO(subscript 3) -1
*ONE OF EACH WILL CANCEL THE CHARGES*
                       

• KNO(subscript 3)  ( Treat Each "CLUMP" like one thing 

More Examples

NA+   SO(subscript 4) -2  -------> NaSO(subscript 4)
MG+2   NO(subscript 3) -1 -----> Mg(NOsubscript 3) subscript2
Al+3   OH-1 --------->Al(OH)subscript

Above is the Crisscrossing method for Binary Ionic compounds (IT'S THE SHORT-CUT)

WHAT WE DID IN CLASS TODAY 9/19/13:

• We  picked up 3 different worksheets- Naming Compounds,     -part 2 wksh, Naming and Formulas of Ionic Compounds
• We finished the notes
• We finished the Honors Chem: Forming Ionic Compounds 
• We did the Honors Chem: Binary Ionic Compounds: Name to Formula Using Crisscrossing, we also did the Honors Chem Polyatomic Ionic Compounds: Name to Formula Using Crisscrossing

H.W. For tonight:

• Finish all the webassigns due at 11:59 pm today
• Make sure you COMPLETE the Honors Chem Forming Ionic Compounds wksh
• USE YOUR TEXTBOOK, and try doing the Naming Compounds and part 2 wkshs for tomorrow. (Just try your best on those)

The next scribe will be Dorothy Wasilewski  :)