Lesson 2.4 - Naming Ionic Bonds
Lesson 2.4 - Naming Ionic Bonds
1 / 14
next
Slide 1: Slide
This lesson contains 14 slides, with text slides.
Items in this lesson
Lesson 2.4 - Naming Ionic Bonds
Slide 1 - Slide
Learning Intention:
What? We are learning how to write the names and chemical formulas for ionic bonds.
Why? In order to use the International Union of Pure and Applied Chemistry (IUPAC) nomenclature correctly.
Success Criteria
I can:
- Identify the properties of ionic bonds.
-Develop formulas for ionic bonds
- Identify the IUPAC nomenclature for ionic bonds when given an ionic compound formula.
Slide 2 - Slide
The International Union of Pure and Applied Chemistry (IUPAC)
The world authority on chemical nomenclature and terminology, including the naming of new elements in the periodic table; on standardized methods for measurement; and on atomic weights, and many other critically-evaluated data.
Slide 3 - Slide
Naming Ionic Bonds:
Formula
Name of Ionic Compound
AlCl
3
Slide 4 - Slide
Naming Ionic Bonds:
Formula
Name of Ionic Compound
AlCl
3
Aluminum chloride
1st element: stays the same name
2nd element:
- becomes lower case
- add "-ide" suffix means negative
- Subscripts not needed in Name
Slide 5 - Slide
Example:
Write the IUPAC nomenclature for K P
3
Slide 6 - Slide
Example:
Write the IUPAC nomenclature for K P
3
K = Potassium
p = Phosphorus
Potassium phosphorus
ide
Potassium Phosphide
Slide 7 - Slide
Writing Formulas for Ionic Compounds
Magnesium nitride
(when given the name)
Slide 8 - Slide
Writing Formulas for Ionic Compounds
SHORT CUT
Magnesium nitride
(when given the name)
1. Write the Symbols
2. Write the Ion Charges
3. Cross over the charges .
4. Remove the charge SIGNS
5. Simplify if possible.
Mg N
2+
Mg
Mg
N
N
3-
3-
2+
Mg N
3
2
Slide 9 - Slide
Why does the Criss Cross / Drop & Swap Work
Magnesium nitride nitrogen
Magnesium Nitrogen
Mg N
Mg N
Cation-Metal
Anion-Nonmetal
2+
3-
2
3
2
Mg N
3
What does this REALLY mean?
3 Mg = +6
2 N = -6
Charges cancel
2+
3-
Slide 10 - Slide
You Try
Magnesium Iodide
Slide 11 - Slide
Naming Ionic Bonds:
Name
Magnesium Iodide
Formula
MgI
3
Subscript: small number written at the bottom right of the element symbol. Tells the number of atoms in the compound(molecule).
Combining Element Symbols in a Compound:
1st letter of a symbol is Upper case. 2nd letter of a symbol is Lower Case.
Slide 12 - Slide
Example:
What is the formula for the compound that forms between magnesium and phosphorous?
Slide 13 - Slide
Example:
What is the formula for the compound that forms between magnesium and phosphorous?
Mg P
Mg P
Mg P
2+
3-
To form a compound with NO charge,
3 Mg is needed = +6
2 P is needed = -6
+2
-3
3
2
symbol
charges
criss cross
drop
charges
