What are Ionic Bonds?
- Writing Compounds.
- Naming Ionic Bonds
- Writing Ionic formulas from names.
-
Bonds:

Chemical Bond – a force that holds two
atoms together
 Caused by:
○ Attraction between ions
○ Attraction of a positively charged nucleus and
the negatively charged electrons of a different
atom.
Bonds:

Two Types of Bonds:
 Ionic Compounds
○ A bond between two elements where electrons are
transferred from one element to another
 Covalent Compounds
○ A bond between two elements where electrons are
shared between the elements
Bonds form between the valence electrons
of each atom!
Ionic Bonds:

Ionic bonds are formed between ions, and
include both a metal and a nonmetal.
 Ion: a charged particle
 Cation: loses one or more electrons to become
positively charged (metals)
 Anion: gains one or more electrons to become
negatively charged (nonmetals)
Ionic Bonds/Compounds:

Simple Ionic Compounds are also
known as Binary Compounds

There are ONLY 2 elements present

Always a metal and a nonmetal

The elements always come from the s
and p blocks on the periodic table.
Oxidation Numbers/States:
What are the charges of each family?
Let’s Review/Practice:
Element:
Iodine
Calcium
Oxygen
Neon
Carbon
Boron
Phosphorous
Sodium
Symbol:
Oxidation Number:
Ionic Bonds: Writing Compounds

Compounds MUST be neutral
 Charges MUST cancel each other
The metal (cation) ALWAYS comes first
 The nonmetal (anion) ALWAYS comes second
 Example:

 Sodium (Na+1) and Oxygen (O -2)
○ Oxygen’s -2 charge needs to be cancelled out by
sodium’s +1 charge.
○ We will need 2 sodium ions to cancel the 1 oxygen ion.
 +1 + 1 + -2 = 0 (this would be neutral)
 So our compounds formula is: Na2O (2 sodiums and 1 oxygen)
Drop and Swap:

The method that is used to make
compounds out of ions.

Bring down and over the numerical value
(WITHOUT the charge sign)
Na2O
DO NOT
WRITE THE
1’S
Drop and Swap:

Subscripts MUST be at the simplest
whole number ratio
Calcium (+2) and Oxygen (-2)
Ca+2
Ca2O2
O-2
CaO
Naming Simple Ionic Compounds:

Writing Names from formulas:
1. Write out the ions (symbol and charge) for each
of the elements present
2. Drop and Swap
3. Simplify if Necessary
Strontium Oxide
Sr+2
Sr2O2
O-2
SrO
Drop and Swap Practice:
Metal
Nonmetal
Calcium
Fluorine
Barium
Sulfur
Lithium
Phosphorous
Magnesium
Oxygen
Boron
Phosphorous
Cesium
Oxygen
Drop and Swap
Form
Simplest Whole Number
Ratio Form
Naming Simple Ionic Compounds
 Rules to Follow:
1. The name of the metal ALWAYS comes first
The metal’s name is the same as it is on the
periodic table
○
2. The name of the nonmetal ALWAYS comes
last
The nonmetal’s name changes.
○

The ending of the nonmetal will change to “ide”
Naming Simple Ionic Compounds:
1. The name of the metal ALWAYS comes first
The metal’s name is the same as it is on the periodic table
○
2. The name of the nonmetal ALWAYS comes last
The nonmetal’s name changes.
○

The ending of the nonmetal will change to “ide”
Na2O
Name the metal directly (rule 1): Sodium
Change the ending of the nonmetal (rule 2): oxide
Sodium Oxide
Naming Simple Ionic Compounds:
1. The name of the metal ALWAYS comes first
The metal’s name is the same as it is on the periodic table
○
2. The name of the nonmetal ALWAYS comes last
The nonmetal’s name changes.
○

The ending of the nonmetal will change to “ide”
CaCl2
Name the metal directly (rule 1): Calcium
Change the ending of the nonmetal (rule 2): chloride
Calcium Chloride
Naming Simple Ionic Compounds:
Simple Ionic
Compound
Formula
KF
Al2O3
CaBr2
Li3P
Li2S
Ionic Compound Name