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Ionic Bonding pg. 82

Ionic Bonding pg. 82. Valence e- transfer to form crystal lattices Metals (+) transfer e- to Nonmetals (-) Cations (+) transfer e- to Anions (-) e- means electrons. Binary Ionic Compounds pg. 82. Made from two elements Cation keeps its name Ex: Magnesium (+2)

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Ionic Bonding pg. 82

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  1. Ionic Bonding pg. 82 • Valence e- transfer to form crystal lattices • Metals (+) transfer e- to Nonmetals (-) • Cations (+) transfer e- to Anions (-) e- means electrons

  2. Binary Ionic Compounds pg. 82 Made from two elements Cation keeps its name Ex: Magnesium (+2) Anion adds suffix –ide Ex: Fluoride (-1) …becomes Magnesium Fluoride MgF₂

  3. Polyatomic Ions pg. 82 • Covalently bonded group of atoms acting as one unit that can bond with other ions. • Positive or Negative Ex: Ammonium NH4+ Hydroxide OH- Nitrate NO3- Sulfate SO42-

  4. What is the correct formula for a compound containing sodium and sulfur? • a. NaS c. NaS2 • b. Na2S d. NaS3

  5. What is the correct formula for a compound containing sodium and sulfur? • a. NaS c. NaS2 • b. Na2S d. NaS3 • Answer: b

  6. Oxidation numbers are used to • a. keep track of the neutrons lost or gained by each atom. • b. keep track of the protons lost or gained by each atom. • c. keep track of the electrons lost or gained by each atom. • d. keep track of the quarks lost or gained by each atom.

  7. Oxidation numbers are used to • a. keep track of the neutrons lost or gained by each atom. • b. keep track of the protons lost or gained by each atom. • c. keep track of the electrons lost or gained by each atom. • d. keep track of the quarks lost or gained by each atom. • Answer: c

  8. The formation of an ionic bond involves the • a. transfer of electrons. • b. transfer of protons. • c. transfer of neutrons. • d. none of the above.

  9. The formation of an ionic bond involves the • a. transfer of electrons. • b. transfer of protons. • c. transfer of neutrons. • d. none of the above. • Answer: a • Valence e- from metal to nonmetal

  10. Fluorine, F, forms a binary ionic compound with lithium, Li. What is the name of this compound? • a. fluorine lithide • b. lithium fluorine • c. lithium fluoride • d. fluorine lithium

  11. Fluorine, F, forms a binary ionic compound with lithium, Li. What is the name of this compound? • a. fluorine lithide • b. lithium fluorine • c. lithium fluoride • d. fluorine lithium • Answer: c • Metal/Cation first, add ide to nonmetal/anion

  12. Covalent Bonds page 85 Two or more elements (nonmetals) share valence electrons to have a more stable outer electron structure.

  13. What is a Molecule? Pg. 85 • Only compounds formed from covalent bonds are called molecules. Metals bonded to nonmetals form ionic crystals not molecules! Circle the molecules and put an X on the compounds that are not molecules. NaCl CO2 CH4 Al2O3 CaCl2 Br2 NaOH H2O C6H12O6 N2 KI C4H10

  14. 3 Types of Bonding pg. 85 • Ionic Bonds – Metal ions bond to nonmetal ions • Covalent Bonds – Nonmetal atoms bond with each other • Metallic Bonds – Metals bond with each other

  15. Properties of Covalent Compounds • Share electrons between nonmetal atoms (elements on right side of the periodic table) • Low melting and boiling points • Brittle • Do not conduct electricity well

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