1. Naming Ionic Compounds by Duaa Saleh

2. Naming Ionic Compounds
Cations - Positively charged ions (can be metals or polyatomic ions)
Anions - Negatively charged ions
*The cation is always named first!!*
For metals with only one possible charge, the name of the metal is used (ex: Group I (1+), Group II (2+), Silver (1+), Zinc (2+), Aluminium (3+)…
For metals with more than one charge, the name of the metal is used, followed by the charge in Roman numerals in parentheses (ex: Copper (II) or Copper (III)…) OR by using the suffix -ous for the lowest charge and -ic for the highest charge and sometimes with the Latinised name for the metal (ex: ferric, ferrous, cuprous, cupric…)

3. Naming Ionic Compounds
The ammonium ion (NH4+) is an example of a polyatomic cation
The hydroxide ion (OH-) is an example of a polyatomic anion
Hydrogen can be a cation or anion: H+ = Hydrogen (cation) H- = Hydride (anion)
Anions can be a negatively charged element or a polyatomic ion
Negatively charged elements have the suffix -ide ex: Oxide (O2-), Sulfide (S2-), fluoride (F-)…

4. Naming Ionic Compounds
Example: MgO CATION: Mg2+ is a metallic ion named Magnesium ANION: O2- is a nonmetallic ion named Oxide Compound Name: Magnesium Oxide

5. Naming Ionic Compounds
Example: FeS CATION: Fe2+ is a metallic ion named Iron (II) or Ferrous (since it can hold more than one charge) ANION: O2- is a nonmetallic ion named Oxide Compound Name: Iron (II) Sulfide or Ferrous Sulfide

6. Naming Ionic Compounds
Example: LiH CATION: Li+ is a metallic ion named Lithium ANION: H- is a nonmetallic ion named Hydride Compound Name: Lithium Hydride

7. Naming Ionic Compounds
Example: H2S CATION: H+ is a metallic ion named Hydrogen ANION: S2- is a nonmetallic ion named Sulfide Compound Name: Hydrogen Sulfide

8. Naming Ionic Compounds
Example: NaOH CATION: Na+ is a metallic ion named Sodium ANION: OH- is a polyatomic anion named Hydroxide Compound Name: Sodium Hydroxide

9. Naming Ionic Compounds
Example: CaCO3 CATION: Ca2+ is a metallic ion named Calcium ANION: CO32- is a polyatomic anion named Carbonate Compound Name: Calcium Carbonate

10. Naming Ionic Compounds
Example: NH4OH CATION: NH4+ is a polyatomic cation named Ammonium ANION: SO42- is a polyatomic anion named Sulfate Compound Name: Ammonium Sulfate

11. Naming Ionic Compounds
Now that you have learned about how to name ionic compounds, you may work on the “Naming Ionic Compounds” worksheet.
Don’t forget to use the rules you have learned so that you name the compounds correctly!
Practice Makes Perfect!
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