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Mr. T. Kwan Hung 2003-1-10

How do ions form ionic compounds?

keep this page open, go to the other sites through another browser

Sequence of web pages to view:

Copy (Ctrl-c) paste (Ctrl-V), open another browser (Ctrl-N)... You should open another browser and keep this page open throughout the lesson! Use (Alt-Tab) to switch browsers.

A)

  • http://www.bio.miami.edu/dywang/101lec-1.html
    Read the webpage above and answer the questions
    1. Why are He, Ne, Ar stable or unreactive?
    2. If hydrogen , carbon and sodium are to form ions, what will be the electron configurations of the ions?

    B) Atoms:

  • http://www.zo.utexas.edu/faculty/sjasper/images/john3.02.jpg
     

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    C) Atomic structure:

  • http://www.anselm.edu/homepage/jpitocch/genbio/atomstruct.JPG
    1.What elements are in the diagrams at the site above? Explain

    D)  How many electrons can be held in the second shell? Explain

  • http://www.anselm.edu/homepage/jpitocch/genbio/electshell.JPG

    E) How to form an ion from an atom?

  • http://www.zo.utexas.edu/faculty/sjasper/images/john3.03.jpg
     

     F) ionic bond

  • http://www.anselm.edu/homepage/jpitocch/genbio/ionicbond.JPG
    How many e- are there in Na atom? How many e- in Cl atom?
    Explain.

    G) Another NaCl example:

  • http://www.zo.utexas.edu/faculty/sjasper/images/john3.09.jpg
     

    H)

  • http://www.webelements.com/webelements/compounds/text/Li/F1Li1-7789244.html
    structure of LiF why LiF not Li2F?

    I)Chem cards:
    Card 22

  • http://www.hcc.mnscu.edu/programs/dept/chem/V.12/page_id_33111.html
     

    J) look at card 27 below:

  • http://www.hcc.mnscu.edu/programs/dept/chem/V.12/page_id_54322.html
    How is this case different from the previous one? How many e- does Li lose to become Li+? How many e- does O gain to become O2-

    K)  using webelements:

  • http://www.webelements.com
    - Click on Mg then MgF2 on the right hand side of the Mg page…
    - Can you tell me why Mg and F have to mix as MgF2 -that is 2 Mg to 1F?
    - Find the compound MgCl2 on the same site… explain why the formula is 1Mg to 2Cl
     

    K2) using all the resources try to find out the e- configurations of the atoms, ions and formula of the compounds formed for the following:

    magnesium Mg and sulfur

    AlCl3 why 1 Al to 3Cl in the formula?
     

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    If time permits

    L) What happens to the Na+ and Cl- in the diagram? Is the end product pure? What is the product called?

  • http://www.anselm.edu/homepage/jpitocch/genbio/h20solvent.JPG

    M) ChemBalancer:  balancing equations

  • http://www.dun.org/sulan/chembalancer/

    N) How are the bonds in the diagram below different from what we learned so far? IS there anything similar in terms of the number of electrons in each case?

  • http://www.anselm.edu/homepage/jpitocch/genbio/covalentbond.JPG

    O) 

  • http://www.chemistrycoach.com/baleq.htm#Balancing Equations by Counting Atoms
     

    P)

  • http://www.ec.gc.ca/water/en/nature/prop/e_intro.htm

    What are some properties of water? How is water used in our world?