1. MAYHAN Ch. 7-8 Review Sheet

2. 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 MAYHAN

3. 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 MAYHAN

4. 3. What’s the difference between ionic BONDING and covalent BONDING? Ionic Covalent Transfer electronsShared electrons Metal/nonmetalsNonmetals Has a chargeNo charge Single bonds onlyCan have double/triple bonds MAYHAN

5. 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 MAYHAN

6. 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. H 2, N 2, O 2, F 2, Cl 2, Br 2, I 2 KNOW THESE!!!~!!! MAYHAN

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

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

9. 8. What properties determine bond strength? C-C longer and weaker O=O not so long and stronger N=N short and strong MAYHAN

10. 9. Provide the Lewis structure, the VSEPR shape and determine the polarity for the following Lewis Structure VSEPR shapeIMF SO 3 CI 4 SeO 2 HF MAYHAN Trig planar DD Dispersion HB DD Tetrahedral Bent Iinear

11. 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 MAYHAN

12. 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 not shared equally between the atoms. Ex: H-Cl MAYHAN

13. 12. Can a molecule have polar covalent bonds and be nonpolar? Explain your answer. Yes, they can. MAYHAN BUT it does have polar bonds Overall– Nonpolar molecule

14. 13. Match the following- answers can be used more than once or have multiple answers. 1. Induced dispersion 2. Dipole-dipole 3. Hydrogen bonding a. 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 3 2 1 1 2 or 3 1 1, 2, 3 MAYHAN

15. Name or Formula Ionic or Covalent ANSWER Li 2 O Nitrogen dibromide SBr 6 Aluminum phosphide Boron sulfide SO 2 CN 2 Potassium nitride Chlorine trifluoride Nitrogen disulfide Magnesium phosphide IonicLithium oxide CovalentNBr 2 CovalentSulfur hexabromide IonicAlP IonicB2S3B2S3 CovalentSulfur dioxide CovalentCarbon dinitride Ionic K3NK3N CovalentClF 3 CovalentNS 2 IonicMg 3 P 2 MAYHAN

16. I Can Describe covalent bonding. Provide the names or formulas for molecules. Draw Lewis dot structures of molecules. Use Lewis dot structures and VSPER theory to determine the shape of a molecule. Predict the intermolecular forces between molecules by using molecular shapes. MAYHAN

17. To Know List- Ch. 3-9 Look at your reading notes from Ch. 9 – 9.1- Covalent bonds Why bonds form? Diatomic Molecules- Name them. Lewis structures- bonding verse lone pairs Double/Triple bonds Bond length verse bond strength MAYHAN

18. To Know List- Ch. 3-9 Look at your reading notes from Ch. 9 (75%) – 9.2 and 9.5 – Naming and Molecular structure Binary molecules- what are they? Naming molecules- Prefixes and rules for mono 3 Exceptions to the octet rule Know the 8 basic shapes of Molecules Electronegativity and polarity relationship Non polar molecules vs Polar molecules MAYHAN

19. To Know List- Ch. 3-9 Test Concentration of MOSTLY Ch. 9 (75%) – Ionic Bonding- Ch. 8 Ionic Bonding Naming/Formula of ionic substances Properties of Ionic bonds – Periodic trends- Ch. 6 – Energy levels-light, E-dot/valence-Ch. 5 – Particles- Protons, Electrons Neutrons-Ch. 4 – Physical chemical properties/changes-Ch. 3 <5% 20% MAYHAN