Presentation on theme: "Writing Compounds First: What are the charges of each family on the periodic table? (look at your notes from last Wednesday, the ones we wrote and didn’t."— Presentation transcript:
Writing Compounds First: What are the charges of each family on the periodic table? (look at your notes from last Wednesday, the ones we wrote and didn’t type.) +1 +2 +3 +4/-4 -3 -2 -1 0
Criss-Cross Method For Ionic Compounds ONLY!! http://www.asdk12.org/staff/wootan_diane/pages/Chemistry_1/Writing_formulas_using_the_ criss_cross.pdf http://www.asdk12.org/staff/wootan_diane/pages/Chemistry_1/Writing_formulas_using_the_ criss_cross.pdf This method helps you to write a formula of a metal with a nonmetal. All you do is look at the charges (off the periodic table). What is the compound for: Na + and Cl - : NaCl H + and O -2 : H 2 O Fe +3 and S -2 : Fe 2 S 3 NH4 + and NO3 - : NH 4 NO 3
Names of compounds. Monatomic cations: Take the name of the from which they are derived, a. Na+ __________________ K+ ____________________ EXCEPT: Many _____________________ metals can form more than one type of cation. A ___________________________ is added to tell the difference. a. Fe 2+ ______________ Fe 3+ __________________ http://www.ausetute.com.au/namiform.html http://www.800mainstreet.com/4/0004-0011-naming-ionic.html Metal SodiumPotassium Transition Roman Numeral Iron (II)Iron (III)
Monatomic anions Add the suffix _________ to the end of the stem from which they are derived. a. N 3- _______________________ b. O 2- ____________________ c. S 2- ___________________ (pg.43) http://www.ausetute.com.au/namiform.html http://www.800mainstreet.com/4/0004-0011-naming-ionic.html -ide Nitride Oxide sulfide
Add the two parts together… Name of cation plus the stem of the anion plus –ide Examples: NaCl is sodium chloride Li 2 F is lithium fluoride Go here for some practice with naming and to see more examples: http://www.teacherbridge.org/public/bhs/teachers/ Dana/ionic.html http://www.teacherbridge.org/public/bhs/teachers/ Dana/ionic.html http://www.chem.purdue.edu/gchelp/nomenclature /poly_atom.htm http://www.chem.purdue.edu/gchelp/nomenclature /poly_atom.htm
Review! Here is a PowerPoint I found that is a review of what you learned: http://www.chemistryland.com/CHM130/Web- PowerPoints/IonicCpds7Ken.ppt#257,1,Slide 1 http://www.chemistryland.com/CHM130/Web- PowerPoints/IonicCpds7Ken.ppt#257,1,Slide 1
Homework The sub has a worksheet for you to complete for tomorrow. Since you are lab free this week, I hope you put some time into it and do your best! See you tomorrow!!