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1. What are the properties of IONIC substances?

1. What are the properties of IONIC substances?. These substances: -Solid Hard and brittle (like salt) at room temp -Conduct electricity when dissolved in water -High boiling/melting points. 2 . What are the properties of COVALENT substances?. These substances:

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1. What are the properties of IONIC substances?

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  1. 1. What are the properties of IONIC substances? These substances: -Solid Hard and brittle (like salt) at room temp -Conduct electricity when dissolved in water -High boiling/melting points

  2. 2. What are the properties of COVALENT substances? These substances: -MOST are liquids/gases at room temp -Do not conduct electricity when dissolved in water -Most can not dissolve in water -Low boiling/melting points

  3. 3. What’s the difference between ionic BONDING and covalent BONDING? Ionic Covalent Transfer electrons Shared electrons Metal/nonmetals Nonmetals Has a charge No charge Single bonds only Can have double/triple bonds

  4. 4. Why do atoms form bonds? Atoms are trying to fill their valence orbit with a stable octet of electrons- in the case of hydrogen it’s a duet

  5. 5. What are diatomic molecules? Name 7 of them. Diatomic molecules are molecules that are made up of 2 identical atoms to become a molecule. H2, N2, O2, F2, Cl2, Br2, I2

  6. 6. How many electrons are involved in covalent bonding?____ 2 shared electrons or a pair of electrons

  7. 7. What is bond dissociation energy? The energy needed to separate a covalent bond

  8. 8. What properties determine bond strength? The number of bonds. As the number of electrons being shared increases this shorted the distance between the atoms becoming stronger- more energy to separate them.

  9. 9. Provide the Lewis structure, the VSEPR shape and determine the polarity for the following

  10. 10. What are the 10 prefixes to molecular compound naming? Mono- 1 Di- 2 Tri- 3 Tetra- 4 Penta- 5 Hexa- 6 Hepta- 7 Octa- 8 Non-9 Deca- 10

  11. 11. What is the difference between a nonpolar covalent bond and a polar covalent bond? Provide an example. Nonpolar covalent bond is where the electrons are shared equally between the atoms. Ex: Cl-Cl Polar covalent bond is where the electrons are notshared equally between the atoms. Ex: H-Cl

  12. 12. Can a molecule have polar covalent bonds and be nonpolar? Explain your answer. Yes, they can. CCl4, the bond between Carbon and Chlorine is a polar covalent bond (chlorine has most of the electrons) but the overall molecule would be nonpolar.

  13. 13. Rank the following bonds according to increasing polarity.a. C-H b. N-H c. Si-H d. O-H e. Cl-H Think electronegativity! Silicon has the lowest electronegativity so ( c) is the least polar Carbon is next (a) Nitrogen is more electronegative (b) Chlorine is bigger so second best (e) Oxygen is the most so (d)

  14. 14. Match the following- answers can be used more than once or have multiple answers.1. Induced dispersion 2. Dipole-dipole 3. Hydrogen bondinga. H-H _____ e. nonpolar covalent____b. H-F _____ f. polar covalent____ c. C-Cl____ g. attraction to nucleus & electrons ___d. O-O ____ h. attraction to adjacent atoms___ 1 1 3 2 or 3 1 2 1, 2, 3 1

  15. Ionic Lithium oxide Covalent NBr2 Covalent Sulfur hexabromide Ionic AlP Covalent BS Covalent Sulfur dioxide Covalent Carbon dinitride Ionic K3N Covalent ClF3 Covalent NS2 Ionic Mg3P2

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