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5.6 – How Elements Form Compounds

5.6 – How Elements Form Compounds. Chemistry Unit Notes for Tuesday, November 8 th , 2011. Welcome to class!! Today is Tuesday, November 8 th , 2011. Thank-you for being here!!

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5.6 – How Elements Form Compounds

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  1. 5.6 – How Elements Form Compounds Chemistry Unit Notes for Tuesday, November 8th, 2011

  2. Welcome to class!! • Today is Tuesday, November 8th, 2011. • Thank-you for being here!! • I will be blocking all internet access during Questions and answers section of our class today. As soon as we go over the questions and answers; I’ll remove the block!! • Very important information!!

  3. Understanding Concepts on p.189 • 1a) How do metals form ionic compounds with non-metals? During the process, one element (metal) becomes positively charged and the other (nonmetal) becomes negatively charged. Opposites attract to each other.

  4. 1b) Describe the process with an example. The lithium (metal) and fluorine (nonmetal) will react this way. The lithium has one electron in its outer ring (orbit); would like to get rid of that electron. Without it; its outer ring (orbit) is full. All elements want / would love to have a full outer ring/orbit. The fluorine wants/REALLY WANTS ONE MORE ELECTRON. The lithium becomes positive after giving away its electron; fluorine becomes negative when it gets the extra electron.

  5. 2) Beryllium and fluorine react to form an ionic compound. • A) Which element is the metal and which is the nonmetal? Beryllium is the metal and fluorine is the nonmetal. • B)Draw Bohn diagrams of beryllium and fluorine.

  6. C) How many electrons must each element gain or lose to form stable ions? The beryllium must lose two electron in/off its outer ring/orbit and the fluorine must gain one in its outer ring. • D) Draw sketches to show how this compound forms by transfer of electrons.

  7. E) Indicate the ionic charges on the ions. Beryllium is +2 and Fluorine is -1. • F) What is the overall charge on the compound? The compound is neutral charge = 0. • G) What is the chemical formula of the compound? BeF₂

  8. 3) Repeat question 2 for the compound formed by aluminum and fluorine. • A) Which element is the metal and which is the nonmetal? • B)Draw Bohn diagrams of aluminum and fluorine.

  9. C) How many electrons must each element gain or lose to form stable ions? • D) Draw sketches to show how this compound forms by transfer of electrons.

  10. E) Indicate the ionic charges on the ions. • F) What is the overall charge on the compound? • G) What is the chemical formula of the compound?

  11. 4) What part of the atom is involved in making chemical bonds?

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