Naming Ions

Name That Celebrity

Norma Jean Mortenson Marilyn Monroe

Eric Bishop Jamie Foxx

Reginald Kenneth Dwight Elton John

Destiny Hope Cyrus Miley Ray Cyrus

Caryn Johnson Whoopi Goldberg

Paul Hewson Bono

When an atom becomes an ion, it’s name changes! Just like how many celebrities change their name when they become famous!

Monotomic Ions Monotomic ion: a single atom with a positive or negative charge resulting from the loss or gain of one or more electrons. Cations: The names of the elements in Group1A, 2A, 3A metals are the same as the name of the metal followed by the word ion or cation. Example: Li+ Name: Lithium ion or Lithium cation Ca2+, Calcium ion/cation

Practice Name the following: Write the chemical formula: Na+ Sr2+ Ba2+ Beryllium cation Potassium cation

Monotomic Ions Note: The charge of any ion of a Group A nonmetal (right side of P.T.) is determined by subtracting 8 from the group number. Anions: Start with the stem of the name and end –ide. Example: Flourine: flouride, F- Oxygen: oxide, 02- Nitrogen: nitride, N3-

Practice Name that anion Sulfur, S2- Phosphorus, P3- Arsenic, As3-

Ions of Transition Metals Transition metals (groups 1B -8B) form more than one cation with different ionic charges. The charge of cations of many transition metal ions must be determined from the number of electrons lost. Example: Iron can be Fe2+ or Fe3+ Use Stock system: place a Roman numeral in parenthesis after the name of element to indicate the numerical value of the charge. Fe2+ Iron(II) ion Fe3+ Iron(III) ion

Practice! Name these transition metal ions Cu+ Cu2+ Cr3+ Mn2+

Polyatomic Ions Ions composed of more than one atom Tightly bound groups of atoms that act as a unit and carry a charge. Most of the names end in – ate or –ite.

Polyatomic Ions When the formula for a polyatomic ion begins with H (hydrogen), you think of the H as representing a hydrogen ion (H+) combined with another polyatomic ion. Example: hydrogen carbonate H+ + CO3-2 = HCO3 -

Naming Scavenger Hunt!

Naming Ionic Compounds If Representative Element (Groups 1A, 2A, or 3A – 7A) 1. Name the cation 2. Name anion, change ending to –ide Ex: MgO Magnesium Oxide Ex: K3P Potassium Phosphide

NaF- LiCl- MgO-

Naming Ionic Compounds with PAI’s 1. Name Cation 2. Name PAI (Anion) Ex: KNO3 Potassium Nitrate Ex: MgCO3 Magnesium Carbonate Reminder: Never break up PAI’s!

Practice Ca(ClO)2 Na2SO4 Na2SO3

Naming Ionic Compounds with Transition Metals (Group B Metals) Remember: They can have different charges (+1, +2, +3, +4) 1. Name metal using Stock system (Roman numeral) 2. Name Anion (ending in –ide) 3. Figure out the charge of the cation based on the charge of the anion Ex: FeCl2 -Options for Iron: Fe2+ or Fe3+ -We know Chloride has a 1- charge (In this example two Cl- ions are present, yielding a 2- charge) -So, Iron needs to balance the 2- charge to create a neutral ionic compound) -Choose Fe2+ Iron(II) Chloride

Practice Fe203 Mn3(PO4)2 You always want to achieve a neutral compound, so balance charges when necessary!

Practice! Al2O3 Cu3N2 PbS2 K2SO4 Sr(OH)2 Fe2(CO3)3

Step One: Translate the name into ions Going backwards Copper(II) Fluoride Step One: Translate the name into ions The cation is copper(II) and the anion is fluoride. Recognize that Copper(II) is Cu2+ and Fluoride is F-. Step Two: Put brackets around the ions, but leave the charges on the outside In this case, copper(II) would be [Cu]2+ and fluoride would be [F]-. NEVER change anything in brackets! Step Three: Cross the charges The charge on the cation is the number of anions you have, and the charge on the anion is equal to number of cations you have. CuF2 Copper(II) Fluoride

Write the Chemical Formula! Potassium Flouride Ammonium sulfate Magnesium Iodide Copper(II) sulfite

More Practice! Copper(II) Acetate Sodium Hydroxide Lithium Oxide Lead(II) Nitrate

Compound Naming Race!