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Ionic/Covalent Compounds Characteristics

Ionic/Covalent Compounds Characteristics. & Counting Atoms/Molecules. Ionic Compounds. We already learned that ionic compounds are formed from 1 atom on the left and 1 atom on the right of the staircase on the Periodic Table getting together. Hundreds of compounds contain ionic bonds.

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Ionic/Covalent Compounds Characteristics

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  1. Ionic/Covalent Compounds Characteristics & Counting Atoms/Molecules

  2. Ionic Compounds • We already learned that ionic compounds are formed from 1 atom on the left and 1 atom on the right of the staircase on the Periodic Table getting together. • Hundreds of compounds contain ionic bonds

  3. Ionic compounds • If ionic bonds occur between metals and oxygen, oxides form. • Most other ionic compounds are called salts.

  4. Ionic Compounds • Many ionic compounds are binary (have 2 elements only) • Binary compounds = 1 cation (positive ion) and 1 anion (negative ion) • Cation = Loses electron • Anion = Gains electron

  5. Example • CaF2 = (Calcium = +2 charge ………………. (+2) • (Fluoride = -1 charge …..-1 +-1 … (-2) Net: 0

  6. Ionic compounds • Form repeating patterns that form an ionic crystal….called a lattice crystal. (the cube) • NaCl (Salt) is what shape under a microscope?

  7. Ionic bonds • Ionic bonds = Very strong…….hard to break….takes a lot of energy to break them. • Ionic bonds = high melting points and high boiling points because it is hard to break the bonds and bonds must be broken to melt and to boil…….

  8. Ionic Compounds • In solid state….they are nonconductors of electricity…..because ions are fixed in solids and can’t move • When dissolved into liquid…….electricity will go through them…..because ions are free to move……these liquids are called electrolytes

  9. Counting Atoms and Molecules • 2NaCl • How many Na atoms? • How many Chlorine atoms? • How many NaCl compounds?

  10. Counting Atoms and Molecules • 2NaCl

  11. Counting Atoms and Molecules • 2NaCl • How many NaCl compounds? 2 • How many Na atoms? • How many Chlorine atoms?

  12. Counting Atoms and Molecules • 2NaCl • How many NaCl compounds? 2 • How many Na atoms? 2 • How many Chlorine atoms?

  13. Counting Atoms and Molecules • 2NaCl • How many NaCl compounds? 2 • How many Na atoms? 2 • How many Chlorine atoms? 2

  14. Guided Practice #1 • 3 CO2 • How many carbon atoms? • How many oxygen atoms? • How many molecules of CO2?

  15. Guided Practice #1 • 3 CO2 • How many molecules of CO2? 3 • How many carbon atoms? • How many oxygen atoms?

  16. Guided Practice #1 • 3 CO2 • How many molecules of CO2? 3 • How many carbon atoms? • How many oxygen atoms?

  17. Guided Practice #1 • 3 CO2 • How many molecules of CO2? 3 • How many carbon atoms? 3 • How many oxygen atoms?

  18. Guided Practice #1 • 3 CO2 • How many molecules of CO2? 3 • How many carbon atoms? 3 • How many oxygen atoms? 6

  19. Guided Practice #2 • Ionic compounds have ____________ melting points and ____________ boiling points.

  20. Guided Practice #2 • Ionic compounds have HIGH melting points and HIGH boiling points.

  21. Guided Practice 3# • 5 KBr • How many molecules of KBr= • How many K atoms= • How many Br atoms =

  22. Guided Practice #3 • 5 KBr

  23. Guided Practice #3 • 5 KBr • How many molecules of KBr= 5 • How many K atoms= • How many Br atoms =

  24. Guided Practice #3 • 5 KBr • How many molecules of KBr= 5 • How many K atoms= • How many Br atoms =

  25. Guided Practice #3 • 5 KBr • How many molecules of KBr= 5 • How many K atoms= 5 • How many Br atoms =

  26. Guided Practice #3 • 5 KBr • How many molecules of KBr= 5 • How many K atoms= 5 • How many Br atoms = 5

  27. Guided Practice #4 • Oxides are formed when metals come together with _______________.

  28. Guided Practice #4 • Oxides are formed when metals come together with Oxygen.

  29. Independent Practice • Now it is your turn…..feel free to ask any questions whenever you are confused.

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