The document serves as a guide for naming and writing formulas for ionic compounds, covering key concepts such as cation charges, the use of Roman numerals for transition metals, and balancing charges. It includes examples and procedures for naming simple binary ionic compounds and writing their formulas, like lithium sulfide and magnesium nitride. Additionally, it features a riddle related to atoms and their electrons.

1. Chemistry 101NoMnClAtURe D. Hamilton, Instructor

2. Chemistry is ElementaryWhat is the name of the chemical in the picture?ObjectiveNaming ionic compounds from formulas Writing formulas from ionic compounds2

3. Cation Charges

4. Transition Metals Requiring Roman NumeralsTransition Metals can form more than one kind of charged ion.Roman Numerals are used to indicate the charge when naming them:Fe2+ iron II ion or ferrous ionFe3+ iron III ion or ferric ion4

5. Simple Anion Charges

6. Nomenclature Flow Diagram6

7. Naming Simple Ionic CompoundsName the compound whose formula is CaCl2Name the two ions present: Metal cation Nonmetal anion Ca2+Cl1- Name: calcium chloride 7

8. To name the ions present:Remember thatmetals use the element namenonmetals change end of name to -ide.Name the compound KI.8

9. Name these simple binary ionic compounds:Li2SMg3N2AlI3CaSeKBr9

10. Answers:FormulaLi2SMg3N2AlI3CaSeKBrNamelithium sulfidemagnesium nitridealuminum iodidecalcium selenidepotassium bromide10

11. Writing an Ionic Compound’s Formula Step 1: Write ions for elements in the name.Step 2: Balance charges by one of two methods.Step 3: Place subscripts behind each element if needed. Sodium chloride Na1+ Cl1- NaCl11

12. Balancing Charges IWrite the formula for tin (II) fluoride.Step 1: Write the ions Sn2+ and F1-.12

13. Balancing Charges IIWrite the formula for tin (II) fluoride.Step 2: How many of each ion will it take to balance the charge electrically? + F1-+ F1-1Sn(2+) + 2F(-1) = 013Sn

14. Balancing Charges IIIWrite a formula for tin (II) fluoride.1Sn(2+) + 2F(-1) = 0Step 3: Place subscripts behind each element. SnF214

15. Crisscrossing Charges I Write the formula for magnesium nitride.Step 1: Write the ions: Mg2+ and N3-15

16. Crisscrossing Charges II Write the formula for magnesium nitride.Step 2: Crisscross charges to become subscripts but delete the sign on the charge: Mg2+ N3-Mg3N216

17. Crisscrossing Charges III Write the formula for magnesium nitride.Step 3: Check the algebraic sum and complete the formula with subscripts:3Mg(2+) + 2N(-3) = 0 Mg3N217

18. Write a formula for:Lithium oxideCopper (II)sulfideAluminum selenide

19. Answers:NamesLithium oxideCopper(II) sulfideAluminum selenideIonsFormulaLi1+ O2- Li2OCu2+ S2- CuSAl3+ Se2- Al2Se3

20. …and now a parting riddle…Two atoms are leaving Blackboard’s EyeOn Cafe.Atom A says to Atom B, “I think I left my electrons inside.” Atom B says, “Are you sure?”“Yes,” Atom A replies. “I’m positive!”Atom B says, “That’s OK, I picked them up!”Who are these two atoms now? 20

21. CreditsCreative Commons/Flicker images found on slides 2, 6, 7, 10-12. Retrieved 3:00 PM June 22, 2009 from http://creativecommons.org/ and http://www.flickr.comGraphics on slides 3, 4 from Instructor Resource CD that accompanies Karen Timberlake’s General, Organic, and Biological Chemistry: Structures of Life, 2nd edition, (2007), Pearson Publishing, San Francisco.Slide 16 Cybart image from Microsoft Office 2007 clipart.Riddle adapted from a joke told on National Public Radio original author is unknown.21