Polyatomic Ions

Exception #1: Polyatomic Ions

Polyatomic Ions = a positively or negatively charged, covalently bonded, group of atoms

Common ones to know:

How to Name Ionic Compounds
Formula -> Name

1.Write the name of the first element (the metal)

  Exception #1: if polyatomic ion, use special name

2.Write the name of the second element (the nonmetal) with an –ide ending

  Exception #1: if polyatomic ion, use special name.    No –ide ending.

  Examples:

  Na3PO4

  MgSO4

  NH4Cl

 

Sodium phosphate

Magnesium sulfate

​Ammonium chloride

Match

Match the following

• Ammonium

• Nitrate

• Hydroxide

• Phosphate

• Sulfate

NH₄ ⁺¹

NO₃^1-

OH^1-

PO₄^3-

SO₄^2-

• NH₄ ⁺¹

• NO₃^1-

• OH^1-

• PO₄^3-

• SO₄^2-

Fill in the Blanks

Write the name of the compounds based on the chemical formula: NaNO₃

Practice Time!
With Exception #1
Write the name of the compounds based on the chemical formulas below.