1. Here we go, 6 step cross-over time. Not a dance :) It's how we write ionic formulas 1. Begin by identifying the metal and nonmetal. 2. Write symbols 3. Write charges (for transition metals, the charge of the metal is the number in the () after the metal name. 4. Cross-over the charges from top to bottom 5. Remove the charges 6. Simplify the numbers and remove 1's Bell ringer- pick up your quiz from yesterday. Get out paper and pencil. Copy these notes.

2. For the following compounds, give the formulas sodium phosphide aluminum sulfide beryllium chloride calcium oxide 1. Begin by identifying the metal and nonmetal. 2. Write symbols 3. Write charges (for transition metals, the charge of the metal is the number in the () after the metal name. 4. Cross-over the charges from top to bottom 5. Remove the charges 6. Simplify the numbers and remove 1's

4. potassium sulfide Calcium fluoride rubidium arsenide strontium selenide 1. Begin by identifying the metal and nonmetal. 2. Write symbols 3. Write charges (for transition metals, the charge of the metal is the number in the () after the metal name. 4. Cross-over the charges from top to bottom 5. Remove the charges 6. Simplify the numbers and remove 1's

5. Barium chloride Cesium carbide

7. For the following compounds, give the formulas magnesium nitrate calcium phosphate ammonium sulfate silver cyanide 1. Begin by identifying the metal and nonmetal. 2. Write symbols 3. Write charges (for transition metals, the charge of the metal is the number in the () after the metal name. 4. Cross-over the charges from top to bottom 5. Remove the charges 6. Simplify the numbers and remove 1's

8. Bell ringer- get out homework and check against screen 22.) Na 3 P 23.) Mg(NO 3 ) 2 2 5.) Ca 3 (PO 4 ) 2 2 9.) BeCl 2 3 5.) CaO 36.) Mg(C 2 H 3 O 2 ) 2 3 9.) BaO

9. http://www.youtube.com/watch?v=CyFG ooWJvGg&list=PL3ABD5DB7B56A641F&i ndex=2&feature=plpp_video

10. lead (II) sulfite copper (I) arsenide iron (III) oxide vanadium (V) phosphate For the following compounds, give the formulas 1. Begin by identifying the metal and nonmetal. 2. Write symbols 3. Write charges (for transition metals, the charge of the metal is the number in the () after the metal name. 4. Cross-over the charges from top to bottom 5. Remove the charges 6. Simplify the numbers and remove 1's

13. Bell ringer

14. We will use the reverse of the 6 step cross-over to do this. 1. Separate the 2 elements or polyatomic ions. 2. Add 1's to elements with no number. 3. Cross-over bottom to top. 4. Add charges- 1st one is +, 2nd one is - 5. Make sure the charges match the expected charges in the PT or PAL. 6. Write the name. Metal stays the same, nonmetal drops its ending and adds -ide. For transition metals, change the charge to roman numerals, place in parentheses following the metal name. [Fe 2+ would change to Iron (II) ]

15. NaOH MgBr 2 KCl Al 2 S 3 Mg 3 P 2 Zn(OH) 2 BeSO 4 Name the following ionic compounds, please note that no Roman Numerals are needed. We will use the reverse of the 6 step cross-over to do this. 1. Separate the 2 elements or polyatomic ions. 2. Add 1's to elements with no number. 3. Cross-over bottom to top. 4. Add charges- 1st one is +, 2nd one is - 5. Make sure the charges match the expected charges in the PT or PAL. 6. Write the name. Metal stays the same, nonmetal drops its ending and adds -ide. For transition metals, change the charge to roman numerals, place in parentheses following the metal name. [Fe 2+ would change to Iron (II) ]

16. Formulas Lesson 4_ Transition Metals Part 2.mp4

17. FeCl 2 FeCl 3 CrF 2 PbO Roman Numerals are needed here, because these contain Transition Metals. We will use the reverse of the 6 step cross-over to do this. 1. Separate the 2 elements or polyatomic ions. 2. Add 1's to elements with no number. 3. Cross-over bottom to top. 4. Add charges- 1st one is +, 2nd one is - 5. Make sure the charges match the expected charges in the PT or PAL. 6. Write the name. Metal stays the same, nonmetal drops its ending and adds -ide. For transition metals, change the charge to roman numerals, place in parentheses following the metal name. [Fe 2+ would change to Iron (II) ]

18. Binary Ionic Compounds Binary Ionic Compounds part 2 Polyatomic part 1 Polyatomic part 2