Write the formula AND the name for the following pairs: Thursday, November 6, 2014 Objective: Students will use the criss cross method to write Type II Formulas. Warm-Up: Write the formula AND the name for the following pairs: Calcium and Oxygen Potassium and Permanganate Agenda: Writing Type 2 formulas notes and practice

Writing Type II Formulas

Overview Type II Ionic bonding occurs between transition metals and non- metals. Unlike the elements in Groups 1, 2, and 13, transition metals can make multiple ions. Because of this, we use roman numerals to signify the charge. Iron (III): Fe3+ The roman numeral is enclosed in parenthesis and goes directly behind the element. Iron (II)

Example Write the ion for the following transition metals: Iron (II) Zinc (I) Copper (III) Cobalt (II)

Writing Formulas From Names Write the symbol for each element Find the charges: The roman numeral is the charge of the cation. The charge of the anion is found on the periodic table. Criss Cross Charges and write the formula. Reduce when necessary.

Examples Tin (II) Sulfide Gold (III) Phosphide Iron (II) Sulfate

Chromium (II) Chloride Copper (III) Bromide Zinc (II) Nitrite Your Turn! Lead (II) Fluoride Chromium (II) Chloride Copper (III) Bromide Zinc (II) Nitrite

Brain Break: This is My Nose