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Ionic Naming

Ionic Naming. EQ: How do we name ionic compounds? HOT Q1: What is the difference between molecular and ionic compounds? HOT Q2: What are the rules for writing the ionic formula from the name? HOT Q3: What are the rules for writing the name from the formula?. Warm Up.

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Ionic Naming

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  1. Ionic Naming

  2. EQ: How do we name ionic compounds? HOT Q1: What is the difference between molecular and ionic compounds? HOT Q2: What are the rules for writing the ionic formula from the name? HOT Q3: What are the rules for writing the name from the formula? Warm Up • Your little brother is eating a twix. What are two ways you can get some of that twix? • Is it easier to share belongings between two people that are similar or two people that are different? Give examples!

  3. Agenda • Warm Up • Agenda • Rehash Molecular • Ionic • Name  Formula • Formula  Name • Transition Metals • Exit Ticket

  4. Two Types of Compounds • Today, we learned the rules for molecular compounds • Tomorrow, we will learn the rules for naming ionic compounds • But how do we tell the two apart???

  5. Ionic Compounds – made of a METAL and a nonmetal • Molecular Compounds - does not have a metal (could be nonmetal + nonmetal or metalloid + nonmetal)

  6. Example • Molecular of Ionic? F3Cl5

  7. Flash! • You will be given an index card • On one side, write a big M • On the other side, write a big I • When I give you the signal, you will hold up either M for Molecular, or I for Ionic

  8. Flash! • Molecular of Ionic? NaCl

  9. Flash! • Molecular of Ionic? dinitrogen pentaoxide

  10. Flash! • Molecular of Ionic? magnesium oxide

  11. Example • Molecular of Ionic? Si2F5

  12. Example • Molecular of Ionic? KF

  13. When a nonmetal and a metal meet each other, they can’t share. They’re too different! • So…the nonmetal will GRAB electron(s) from the metal.

  14. It forms an ION. Hence, the name IONIC bond • Ionic Compounds = made of a metal and a nonmetal

  15. Cation and Anion Ionic Compounds are made of a cation and an anion. • Cation – a POSITIVELY charged atom formed by losing an electron (almost always a metal) • Anion – a NEGATIVLEY charged atom formed by gaining an electron (almost always a non-metal)

  16. Ionic Love • How do we name these ionic compounds?

  17. How do we go from formula to its name? Ionic compounds DO NOT use Greek prefixes like molecular compounds. Charge is used instead. • Metals become cations (+). • Group 1 metals have a +1 charge (ex: Na+, Li+, K+) • Group 2 metals have a +2 charge (Mg2+, Ca2+) • Upper part of Group 3 have a +3 charge (Al3+) For cations, the ion name is the same as the element (Na+ = sodium ion) Fill in the group charges on your periodic table

  18. Ionic Rules Continued… 2. Non-metals form anions (-) (except Hydrogen-can form H+ or H-) -The noble gases have no charge (don’t react!) -The halogens form a -1 charge (F-, Cl-, Br-) -The oxygen family forms a -2 charge (O2-, S2-) -The nitrogen family forms a -3 charge (N3-, P3-) For anions, change the ending to “-ide” (ex: O2- = oxide and P3- = phosphide) ** Fancy word for charge = oxidation number

  19. Steps • 1. Write the cation (re: metal element) name. It will be the SAME as the normal element! • 2. Write the anion (re: nonmetal element) name and change the ending to -ide.

  20. Example a. K2O b. Na2S

  21. You Try! • MgCl2 • Na3N

  22. How do we go from name to formula? Cesium Oxide

  23. Swap, Drop, and Chop it! • What is the chemical formula of • Aluminum Oxide? Al O + - 3 2

  24. Swap Drop and Chop It! Calcium Oxide 1. 2. 3. Magnesium Nitride 1. 2. 3.

  25. You Try! a. lithium bromide b. sodium iodide

  26. Youtube break http://www.youtube.com/watch?v=_JmA2ClUvUY

  27. Transition Metals Remember “short crazy land”? These are the transition metals and they have multiple charges - IF THE CHARGE VARIES, we need roman numerals to show the charge (ex: Fe2+= iron (II) and Fe3+= iron (III)) -3 EXCEPTIONS: zinc is always Zn2+, cadmium is always Cd2+, and silver is always Ag+1

  28. Writing the formulas Same steps! chromium (III) oxide lead (II) oxide

  29. Naming The charges must add up to 0! SnBr2 SnBr4

  30. More Practice • cobalt (III) oxide • copper (II) iodide

  31. Even More Practice • Hg2O • HgS

  32. -ide help Flourine  flouride Oxygen  oxide Phosphorus  phosphide Bromine  bromide Nitrogen  nitride Chlorine  chloride Hydrogen  hydride

  33. Exit Ticket • Write the name for NaI2 2. What is the formula for Beryllium Nitride?

  34. Molecular • Pentaiodine monophosphide • Silicon dioxide • Se2Br5 • NO4

  35. Nomenclature Recap 2 nonmetals = ____________ compound uses greek prefixes: mono, di, tri, tetra… 1 metal + 1 nonmetal = ________compound • Use charges on periodic able to swap drop and lock it! molecular Ionic

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