1. What is the easiest way for chlorine to get 8 valence?
Atoms want to attain noble gas stability of valence s & p orbitals filled….
What is the easiest way for sodium to get 8 valence?
Na:1s22s22p6 3s1
What is the easiest way for chlorine to get 8 valence?
Cl: 1s22s22p63s23p5 Pg
lose
gain
Octet Rule – atoms tend to _____, _____ or _______ until they have 8 valence electrons
share

2. Cation: “+” (positively) charged ion
Anion: “-” (negatively) charged ion
Pg 55-57

3. Use what you know about electron configurations & Lewis Dot diagrams to predict the charge for each ion:
K O
I P
Zn Ti

4. Ionic Bonding electron transfer from one atom to another
to create noble gas stable ions
oppositely charged ions attract
Pg 56-57;

5. Ionic Bonding
the electrical attraction that “glues” (keeps the ions together) is called “ionic bond”
Linked
Pg 56-57;

6. Formula Writing “NaCl” LinkEd LinkEd when writing chemical formulas
positive cation is written first
negative anion is written second
total charge of cation must equal total charge of anion
LinkEd
“NaCl”
LinkEd

7. How/what compound forms when Ca bonds with Cl ???
write Lewis dot diagram for Ca
write Lewis dot diagram for Cl
How must electrons transfer to create noble gas stability
Write the formula for this compound.
CaCl2
Linked

8. How/what compound forms when Mg bonds with N ???
Write Lewis Dot Diagram for Mg
Write Lewis Dot Diagram for N
How must electrons transfer to create noble gas stability
Write the formula for the new compound.
LinkEd
Magnesium nitride was the catalyst in the first practical synthesis of borazon (cubic boron nitride). CBN is used as a blade sharpener instead of diamond.

9. ions bond together to make a new/ different compound…
You’re gonna call me WHAT???
ions bond together to make a new/ different compound…
so…what do we call the new compound?

10. Naming Monoatomic Ions
Cations
named for parent element followed
by “ion”
Na+  “sodium ion”
K +  ???
“potassium ion”
Anions
named for parent element BUT drop the ending and add “ide”
Br-  bromine becomes  “bromide ion”
S-2 ???
Oxygen ???
“sulfide ion”
“oxide ion”

11. Transition Metal Ions can have more than one charge (Fe+2 or Fe+3 )…so how do you know which is in a compound?
Stock System – use Roman numerals to designate charge
Pb+2  lead (II) ion
Pb+4 lead (IV) ion
Latin System – if only two possible charges, use:
suffix “ous” to designate lower charge
suffix “ic” to designate higher charge
Fe+2  ferrous ion
Fe+3  ferric ion

12. Naming Binary Ionic Compounds
Write cation first followed by anion
KI  “potassium iodide”
if cation can have multiple charges; designate specific charge using either the Stock or Latin System
PbO2  ???

13. Practice – write the formula and name for the compound that forms when the following bond
strontium and bromine
sodium and phosphorous
iron (II) ion and oxygen

14. Polyatomic Ions
two or more atoms bound together predominantly by covalently bonds
they form a stable group that carries a charge
(NH4)+
“ammonium ion”
(OH)-
“hydroxide ion”

15. Practice – write the formula and name for the compound that forms when the following bond
strontium and hydroxide
sodium and phosphate
iron (II) and sulfate