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IONIC BONDS

What are Ionic Bonds? Writing Compounds. Naming Ionic Bonds Writing Ionic Compounds from names . IONIC BONDS. Bonds:. Chemical Bond – a force that holds two atoms together Caused by: Attraction between ions

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IONIC BONDS

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  1. What are Ionic Bonds? Writing Compounds. Naming Ionic Bonds Writing Ionic Compounds from names. IONIC BONDS

  2. Bonds: • Chemical Bond – a force that holds two atoms together • Caused by: • Attraction between ions • Attraction of a positively charged nucleus and the negatively charged electrons of a different atom.

  3. Bonds: • Two Types of Bonds: • Ionic Compounds • A bond between two elements where electrons are transferred from one element to another • Covalent Compounds • A bond between two elements where electrons are shared between the elements Bonds form between the valence electrons of each atom!

  4. Ionic Bonds: • Ionic bonds are formed between ions, and include both a metal and a nonmetal. • Ion: a charged particle • Cation: loses one or more electrons to become positively charged (metals) • Anion: gains one or more electrons to become negatively charged (nonmetals)

  5. Ionic Bonds/Compounds: • Simple Ionic Compounds are also known as Binary Compounds • There are ONLY 2 elements present • Always a metal and a nonmetal • The elements always come from the s and p blocks on the periodic table.

  6. Oxidation Numbers/States:What are the charges of each family?

  7. Let’s Review/Practice:

  8. Ionic Bonds: Writing Compounds • Compounds MUST be neutral • Charges MUST cancel each other • The metal (cation) ALWAYS comes first • The nonmetal (anion) ALWAYS comes second • Example: • Sodium (Na+1) and Oxygen (O -2) • Oxygen’s -2 charge needs to be cancelled out by sodium’s +1 charge. • We will need 2 sodium ions to cancel the 1 oxygen ion. • +1 + 1 + -2 = 0 (this would be neutral) • So our compounds formula is: Na2O (2 sodiums and 1 oxygen)

  9. Drop and Swap: • The method that is used to make compounds out of ions. • Bring down and over the numerical value (WITHOUT the charge sign) Na2O DO NOT WRITE THE 1’S

  10. Drop and Swap: • Subscripts MUST be at the simplest whole number ratio Calcium (+2) and Oxygen (-2) Ca+2 O-2 Ca2O2CaO

  11. Drop and Swap Practice:

  12. Practice Time: • You have 5 minutes to complete the handout. • This will be turned in for a grade.

  13. Practice Problem Answers: • KI • CaCl2 • NaCl • Li3P • MgS

  14. Naming Simple Ionic Compounds • Rules to Follow: • The name of the metal ALWAYS comes first • The metal’s name is the same as it is on the periodic table • The name of the nonmetal ALWAYS comes last • The nonmetal’s name changes. • The ending of the nonmetal will change to “ide”

  15. Naming Simple Ionic Compounds: • The name of the metal ALWAYS comes first • The metal’s name is the same as it is on the periodic table • The name of the nonmetal ALWAYS comes last • The nonmetal’s name changes. • The ending of the nonmetal will change to “ide” Na2O Name the metal directly (rule 1): Sodium Change the ending of the nonmetal (rule 2): oxide Sodium Oxide

  16. Naming Simple Ionic Compounds: • The name of the metal ALWAYS comes first • The metal’s name is the same as it is on the periodic table • The name of the nonmetal ALWAYS comes last • The nonmetal’s name changes. • The ending of the nonmetal will change to “ide” CaCl2 Name the metal directly (rule 1): Calcium Change the ending of the nonmetal (rule 2): chloride CalciumChloride

  17. Naming Simple Ionic Compounds:

  18. Practice Time: • You have 5 minutes to complete the handout. • This will be turned in for a grade.

  19. Practice Problem Answers: • Sodium Sulfide • Barium Bromide • Potassium Iodide • Lithium Nitride • Gallium Sulfide

  20. Naming Simple Ionic Compounds: • Writing Names from formulas: • Write out the ions (symbol and charge) for each of the elements present • Drop and Swap • Simplify if Necessary Strontium Oxide Sr+2 O-2 Sr2O2 SrO

  21. Naming Simple Ionic Compounds:

  22. Practice Time: • You have 5 minutes to complete the handout. • This will be turned in for a grade.

  23. Practice Problem Answers: • Al2O3 • MgS • Na3P • K3N • AlF3

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