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Block 41: W 1/15 and Th 1/16

Block 41: W 1/15 and Th 1/16. Nomenclature Warm-up #7 Identify these compounds as ionic or covalent, then name them. Remember to use Roman numerals when necessary! ____ (I or C) 1. Ag 2 O ____ (I or C) 2. AlN ____ (I or C) 3. Mg(ClO 2 ) 2 ____ (I or C) 4. NiCl 2

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Block 41: W 1/15 and Th 1/16

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  1. Block 41: W 1/15 and Th 1/16 Nomenclature Warm-up #7 Identify these compounds as ionic or covalent, then name them. Remember to use Roman numerals when necessary! ____ (I or C) 1. Ag2O ____ (I or C) 2. AlN ____ (I or C) 3. Mg(ClO2)2 ____ (I or C) 4. NiCl2 ____ (I or C) 5. N2O4 Quiz TODAY and ANOTHER ONE next class over naming compounds: covalent, ionic (with roman numerals and polyatomic ions)

  2. Nomenclature Quiz#1 • There are NO covalent—only ionic! • There are transition metals and polyatomic ions. • Timed: 12 minutes

  3. Science Fair HELP!! • If you have your red sheet, pass it up. • If you brought in food, drink or prize donation, turn it in to me and get your homework pass!

  4. Sapling #16: Due Tuesday 1/21 • Remember Sapling assignments are due on Tuesdays at 11:55 pm. • Your log on is S and your student ID • Your password is just your student ID unless you changed it

  5. Pg 5—check your answers • STUDENTS DO ON BOARD

  6. Writing formulas for compounds • Covalent: use prefixes in name to figure out how many of each element • Ionic: • Must write a balanced formula ( + = - ) • roman numerals tell you charge of transition metals (remember the exceptions: CdZnAgAl) • Write polyatomic ions WITHOUT changing subscripts! (if you need more than one use parenthesis)

  7. Homework: page 7 #1-8 bottom half Formula writing examples • Hydrogen monoiodide • Sulfur difluoride • Chromium (III) Sulfide • Mercury (I) Chloride • Cadmium iodide • Strontium chloride • Calcium carbonate • Potassium sulfate

  8. Bonding with lewis dot structurespage 8 • Ionic: metal + nonmetal • Metal will give away electrons • Nonmetal will receive electrons • Now that both have opposite charges: they are ATTRACTED to each other • An ionic bond is an electrostatic attraction of positive and negative • Covalent: nonmetal + nonmetal • An element will make bond until it has access to 8 electrons (or two for hydrogen) • When two nonmetals “share” a pair of electrons it is a bond, is drawn as a line and is counted as TWO electrons • If two atoms make more than one bond with each other it is a double or triple bond

  9. Bonding with lewis dot structurespage 8 • Let’s try some together: Magnesium + chlorine

  10. Bonding with lewis dot structurespage 8 • Let’s try some together: Nitrogen + hydrogen

  11. Bonding with lewis dot structurespage 8 • Let’s try some together: Nitrogen + nitrogen

  12. Coming Up: • Fri/Tues will be a work day • You will complete the rest of your nomenclature packet • If you finish, you can work on your sapling assignments • Test: Friday 1/24 or Monday 1/27 (I will not be here on Tuesday 1/21)

  13. Homework • Homework: • Page 7 bottom half #1-8 (formula writing) • Sapling #16—due Tuesday 1/21 at 11:55pm • Nomenclature quiz: Fri 1/17 & Tues 1/21 • Nomenclature Test: Fri 1/24 and Mon 1/27 • Naming, formula writing for ionic and covalent compounds

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