Naming Ionic Compounds by Duaa Saleh Naming Ionic

Naming Ionic Compounds by Duaa Saleh

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, cupric…)

Naming Ionic Compounds • The ammonium ion (NH 4+) 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 (O 2 -), Sulfide (S 2 -), fluoride (F-)…

Naming Ionic Compounds • Example: Mg. O CATION: Mg 2+ is a metallic ion named Magnesium ANION: O 2 - is a nonmetallic ion named Oxide Compound Name: Magnesium Oxide

Naming Ionic Compounds • Example: Fe. S CATION: Fe 2+ is a metallic ion named Iron (II) or Ferrous (since it can hold more than one charge) ANION: O 2 - is a nonmetallic ion named Oxide Compound Name: Iron (II) Sulfide or Ferrous Sulfide

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

Naming Ionic Compounds • Example: H 2 S CATION: H+ is a metallic ion named Hydrogen ANION: S 2 - is a nonmetallic ion named Sulfide Compound Name: Hydrogen Sulfide

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

Naming Ionic Compounds • Example: Ca. CO 3 CATION: Ca 2+ is a metallic ion named Calcium ANION: CO 32 - is a polyatomic anion named Carbonate Compound Name: Calcium Carbonate

Naming Ionic Compounds • Example: NH 4 OH CATION: NH 4+ is a polyatomic cation named Ammonium ANION: SO 42 - is a polyatomic anion named Sulfate Compound Name: Ammonium Sulfate

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! © All images used in this presentation come from the Microsoft Clipart gallery