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Unit 3 Chemistry Review: Vocabulary and Bonding Concepts

This review sheet covers key concepts for Unit 3 in chemistry, focusing on bonding types, vocabulary, and ionic vs. covalent compounds. Students will create a vocabulary foldable featuring essential terms such as anion, cation, ionic bond, covalent bond, and valence electron. The trifold activity encourages learners to illustrate definitions and understand the importance of bonding in chemical reactions. Additionally, there are exercises on determining valence electrons, labeling elements, and balancing chemical equations. Preparedness for upcoming assessments is emphasized.

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Unit 3 Chemistry Review: Vocabulary and Bonding Concepts

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  1. Physical Sci – Catalysts - Unit 3

  2. Review Sheet • After Unit 2 Test • Create a vocabulary foldable for Unit 3 • Make a trifold like we did for the scientists in your NtBk, with 5 flaps per side • On each flap write one of the terms, then • under the flap sketch a picture showing the meaning, • On the back of the flap write the def. in your words • Anion CationCovalent Bond Ionic BondHydrogen Bond MoleculeCompound IonValence Electron Octet Rule

  3. Review Sheet • After Unit 2 Test • Create a vocabulary foldable for Unit 3 • Make a trifold like we did for the scientists in your NtBk, with 5 flaps per side • On each flap write one of the terms, then • under the flap sketch a picture showing the meaning, • On the back of the flap write the def. in your words • Anion CationCovalent Bond Ionic BondHydrogen Bond MoleculeCompound IonValence Electron Octet Rule

  4. Catalyst #19 (Unit #3) : • How many valence electrons do each of these elements have: • Oxygen • Sulfur • Sodium • Magnesium • Complete an Electron Dot diagram for each of the above elements. • How many valence electrons does each of the elements need to become “stable”/”happy”? • Explain the difference between Ionic and Covalent bonding

  5. Catalyst #20 (Unit #3) • Element Gain/Lose e-? how many? Ion • Nitrogen • Chlorine • Lithium • Aluminum • Name the following Ionic Compounds: • MgCl2 = _________ ____________ • Al2O3 = _________ ____________ • Name the following Covalent Compounds: • NO2 = _________ ____________ • P2O5 = _________ ____________

  6. Catalyst #21 (Unit #3) • Label each element as a Metal/Nonmetal/Metalloid, then the type of bonding for each of the following compounds (Ionic, Covalent): • MgCl2 = _________ • Al2O3 = _________ • H2O= _________ • CO2 = _________ • Ca(CO3) = _________ • Name each of Compounds (use the right rules):

  7. Catalyst #22 (Unit #3) • Label each element as a Metal/Nonmetal/Metalloid, then the type of bonding for each of the following compounds (Ionic, Covalent): • NaCl = _________ • CH4 = _________ • H2O2 = _________ • MgF2 = _________ • Ca(SO4) = _________ • Name each of Compounds (use the right rules):

  8. Catalyst #23 (Unit #3) : • Use the criss cross method to write the formulas for the following Ionic Compounds • Magnesium Chloride • Sodium Chloride • Calcium Sulfate • Magnesium Carbonate • Ammonium Nitrate

  9. Catalyst #24 (Unit #3) • DESCRIBE and SHOW EACH STEP (explain) how you use the criss cross method to write the formulas for the • Magnesium Chloride [Ionic] • Write the Symbol for each element/polyatomic ion (Mg Cl) • ______________________ • ______________________ (d)…, etc. • DESCRIBE and SHOW EACH STEP (explain) how you write the formulas for the Covalent Compound • DiHydrogenPentoxide • Write the Symbol for the 1st (H) convert the “ide” to the 2nd (O) (b)__, (c)___…, etc.

  10. Catalyst #25 (Unit #3) • Al + CuCl2 Cu + AlCl3 • In the chemical equation/reaction above, • What are the reactants? • What are the products? • What does the arrow mean? • How many of each element are on each side? • Balance the equation (show your work)

  11. Catalyst #26 (Unit #3) Ca(ClO3)2 CaCl2 + O2 In the chemical equation/reaction above, What are the reactants? What are the products? How many of each element are on each side? Balance the equation (show your work) For each chemical equation, name it’s TYPE: 2Al + 3CuCl2 3Cu + 2AlCl3 ___________ Ca(ClO3)2 CaCl2 + 3O2 ___________ Na2SO4 + Mg(OH)2NaOH + MgSO4 ________ Li2O + MgBr2 2LiBr + MgO ________ 2H2 + O2 2H2O ________

  12. Catalyst #27 (Unit #3) H2O  H2 + O2 In the chemical equation/reaction above, What type of chemical reaction is this? What are the reactants? What are the products? Does the equation show Conservation of Mass? Balance the equation (show your work) For each chemical equation, name it’s TYPE: Na2SO4 + Mg(OH)2NaOH + MgSO4 ________ Mg + 2HCl  MgCl2 + H2 ________ CaO + H2O  Ca(OH)2 ________

  13. Catalyst #28 (Unit #3) H2O  H2 + O2 In the chemical equation/reaction above, What type of chemical reaction is this? What are the reactants? What are the products? Balance the equation (show your work) For each chemical compound, identify the type of bonding, and name the compound : Se3Br4 ________ ________________ MgCl2 ________ ________________ Mg(OH)2 ________ ________________ How many valence electrons? What charge ? O ___ _____ Li ___ ____ Al ___ ___

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