1. NOMENCLATURE REVIEW

2. RULES FOR NAMING IONIC COMPOUNDS 1.Find the name of the first element (cation) from your periodic table or ion sheet 2.Find the name of the second element or polyatomic ion from your ion sheet The second element (anion) always changes its name The second element (anion) always changes its name

3. NAMING IONIC COMPOUNDS

5. PRACTICE 1.MgBr 2 2.Rb 2 O 3.Li 3 N 4.K 2 SO 4 5.Na 2 CO 3

6. TRANSITION METALS Some cations must show their charge Some cations must show their charge How would we name FeO & Fe 2 O 3 ? How would we name FeO & Fe 2 O 3 ? Iron oxide Iron oxide Transition metals can form more than one type of cation Transition metals can form more than one type of cation We must use Roman numerals to distinguish them We must use Roman numerals to distinguish them Example: Iron (II) oxide & Iron (III) oxide Example: Iron (II) oxide & Iron (III) oxide

8. PRACTICE 1.Cr(OH) 3 2.CuSO 4 3.Pb 3 (PO 4 ) 2 4.FeCl 3 5.AgNO 3

9. WRITING FORMULAS FOR IONIC COMPOUNDS Step 1: Write down the symbols that match the ions Step 1: Write down the symbols that match the ions Step 2: Determine the charge of each one Step 2: Determine the charge of each one Step 3: Find the least common multiple of the ions’ charges. Step 3: Find the least common multiple of the ions’ charges. Step 4: Write the chemical formula, indicating with subscripts how many of each ion are needed to make a neutral compound. Step 4: Write the chemical formula, indicating with subscripts how many of each ion are needed to make a neutral compound. *use parentheses when you have more than one polyatomic ion *use parentheses when you have more than one polyatomic ion

10. PRACTICE 1.Lithium oxide 2.Potassium chloride 3.Titanium (III) nitride 4.Cobalt (III) hydroxide 5.Copper (I) sulfate 6.Aluminum phosphate

11. NAMING COVALENT COMPOUNDS Are named using different rules Are named using different rules For two-element covalent compounds, we use numerical prefixes to tell how many atoms of each element are in the molecule For two-element covalent compounds, we use numerical prefixes to tell how many atoms of each element are in the molecule Example: N 2 O 4 Example: N 2 O 4 Dinitrogen tetroxide

12. PRACTICE SF 4 SF 4 PCl 3 PCl 3 N 2 O N 2 O P 2 O 5 P 2 O 5 CCl 4 CCl 4

13. WRITING FORMULAS FOR COVALENT COMPOUNDS Step 1: Write down the symbols that match the element names Step 1: Write down the symbols that match the element names Step 2: Write the value of any prefixes as the subscript for each corresponding element Step 2: Write the value of any prefixes as the subscript for each corresponding element

14. PRACTICE 1.Tetraphosphorus decaoxide 2.Selenium monoxide 3.Dioxygen difluoride 4.Sulfur hexafluoride 5.Dihydrogen monoxide 6.Nitrogen trihydride