Chemical Bonding POGIL, Exams of Nursing

Download Chemical Bonding POGIL and more Exams Nursing in PDF only on Docsity! Chemical Bonding POGIL Activity 2 – Types of bonds… Getting Started: There are two major classes of compounds typically encountered as part of an introductory course: ionic and covalent compounds. The concepts describing how these compounds are held together can be developed as you progress through your studies. However, before you get to those concepts you must be able to quickly classify a compound into one class or the other. In other words, your ability to classify compounds will guide how you will think about bigger ideas. The Model: Table 1 – Compounds that are considered… Ionic Covalent ZnCl2 CCl4 Na2O P2O5 Fe2O3 N2O4 CuI NI3 Reviewing the Mode l 1. The compound ZnCl2 is considered to be a (an) ionic compound. 2. The compound that contains nitrogen and oxygen is a (an) covalent compound. Exploring the Mode l 3. Does the classification seem to be made based on how many atoms of each element are represented in the formula? 4. Write the symbols for the elements presented by the Model (Table 1) near their correct location on the outline of the periodic table. 5. Compare the types of elements found (metals or nonmetals) for the two classes of compounds. Do you see any trend in the type of elements present and the classification? Exercising Your Knowledge 6. Classify each of the following as either ionic or covalent. ionic a. NaBr covalent f. BaS Ionic b. SF6 ionic c. CoBr2 covalent d. OF2 covalent e. NO2 g. CsF2 ionic h. CrCl3 ionic covalent i. CO2 covalent j. CO no it doesn’t ionic is metal and nonmetal covalent is non metal, metal metals 6. Compare the second part of the compound name to the name of the element from the periodic table. How does the name of the anion correspond to the name of the element? 7. From what part of the periodic table do the cations in the Model come (metals or nonmetals)? 8. From what part of the periodic table do the anions in the Model come? Exercising Your Knowledge 9. For each of the following, predict whether the ion will likely be a cation or an anion. a. Magnesium ion b. Selenide ion c. Bromide ion d. Cesium ion 10. For each ionic compound, identify the cation and the anion. a. Sodium fluoride b. Strontium sulfide c. Lithium iodide d. Barium chloride 11. In what way did the name provide clues about the classification of each element as a cation or anion? there is an ide to the end non metals cation anion anion cation cat an cat an cat an cat an the metal doesn’t the non metal changes to ide left of stair step right of stairstep 12. Where on the periodic table would you expect to find elements that ionize to form cations? 13. Where on the periodic table would you expect to find elements that ionize to form anions? Summarizing Your Thoughts 14. Consider the clues you identified, and write a general rule for how you change the name of elements to cations when naming ionic compounds. 15. Consider the clues you identified, and write a general rule for how you change the name of elements to anions when naming ionic compounds. 5 the names of cations on’t change the ending of anions become ide 3 overall charge must be zero Chemical Bonding POGIL Exercising Your Knowledge 10. How many chloride ions would combine with an Al+3 ion to form aluminum chloride? 11. What charge does the barium ion possess in the compound BaCl2? Summarizing Your Thoughts 12. Explain how you determined the number of chloride ions needed in aluminum chloride. 13. From Table 3 and the answers above, what do you know about the overall charge on ALL ionic compounds? 14. List at least three necessary steps to obtain the correct chemical formula of any simple ionic compound. Activity 5 – When the Romans march through… Objective: • Understand how to write the chemical formula of an ionic compound containing metals with varying oxidation states. Getting Started: When a Group IA metal forms a cation, it will always form a +1 cation. When a Group IIA metal forms a cation, it will always form a +2 charge. However, as we progress into the transition metals we find that these metals can form cations with different charges under different circumstances. Use the Model below to develop some rules that describe how to communicate the charge of the cation. 7 +2 Al is a positive charge of three ion so a negative three charge would be needed. write the symbol of the metal, write the formula of the nonmetal, put subscripts that are needed to balance the charge to zero. The Model: Examine the table below, and answer the following questions. Table 4 Chemical Formula Chemical Name FeBr2 iron (II) bromide FeBr3 iron (III) bromide PbO lead (II) oxide PbO2 lead (IV) oxide Cu3N copper (I) nitride Cu3N2 copper (II) nitride Reviewing the Mode l 1. What is the expected charge on the bromide ion? 2. What is the expected charge on the oxide ion? 3. What is the expected charge on the nitride ion? 4. Represent the Roman numeral II as an Arabic numeral. 5. Represent the Roman numeral III as an Arabic numeral. 6. Represent the Roman numeral IV as an Arabic numeral. 7. What two elements are present in the compounds in the last two rows of Table 4? -1 -2 -3 +2 +3 +4 copper