Monday, November 9, 2009

11/9/09

Today, we went over the test and took some notes. The outline for ch. 6 is due sometime at the end of the week. We will also have a QUIZ on ch.6 on THURSDAY.

Ionic Compounds
Most of the rocks and minerals that make up the Earth's crust consist of positive and negative ions held together by ionic bonding. (Ex. Table salt consists of sodium and chloride ions combined in a one to one ratio so that each pos. charge is balanced by a neg. charge.)
A ionic compound is composed of positive and negative ions that are combined so that the numbers of positive and negative charges are equal.
Most ionic compounds exist as crystalline solids. A crystal of any ionic compound is a three-dimensional network of positive and negative ions mutually attracted to each other. In contrast to a molecular compound, an ionic compound is not composed of independant, neutral units that can be isolated.
The chemical formula of an ionic compound represents not molecules, but the simplist ratio of the compound's ions. A formula unit is the simplist collection of atoms from which an ionic compound's formula can be established. The sodium ion has one valence electron and the chlorine atom has seven valence electrons.
Atoms of Sodium and other alkali metals easily loose one electron to form cations. Atoms of chlorine and other halogens easily gain one electron to form anions. In an ionic crystal, ions maximize their potential energy by combining in an orderly arrangement known as a crystal lattice. Attractive forces exist between oppositely charged ions within lattice.
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19 comments:

  1. Matt OriansNovember 9, 2009 at 2:38 PM

    Here is some more information on crystal lattices:

    http://www.chem.lsu.edu/htdocs/people/sfwatkins/ch4570/lattices/lattice.html

    ReplyDelete
  2. H.HillNovember 9, 2009 at 3:27 PM

    Ths site talks about ionic crystals. www.tf.uni-kiel.de/matwis/amat/def_en/kap_2/basic/b2_1_6.html

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  3. Peter WetzelNovember 9, 2009 at 3:36 PM

    Very helpful site explaining Ionic compounds:
    encyclopedia.farlex.com/Ionic+compounds.html

    Clarifies Crystal lattice:

    www.britannica.com/EBchecked/topic/145256/crystal-lattice

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  4. (The) David RayNovember 9, 2009 at 4:16 PM

    this talks all about ionic compounds

    http://misterguch.brinkster.net/ionic.html

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  5. Patrick BloseNovember 9, 2009 at 4:17 PM

    Good website on ionic compounds

    http://www.ausetute.com.au/namiform.html

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  6. DuklewskiNovember 9, 2009 at 4:32 PM

    the guys from khan academy explaining ionic bonds as opposed to covalent bonds
    http://www.youtube.com/watch?v=CGA8sRwqIFg

    ReplyDelete
  7. Jacob PoseyNovember 9, 2009 at 4:55 PM

    http://www.elmhurst.edu/~chm/vchembook/143Aioniccpds.html

    ReplyDelete
  8. Justin ScheunerNovember 9, 2009 at 5:02 PM

    list of all possible crystal lattice structures and the atoms in said structures
    cst-www.nrl.navy.mil/lattice/

    ReplyDelete
  9. Patrick SweeneyNovember 9, 2009 at 5:27 PM

    Talks about crystal lattices.

    http://www.chem.lsu.edu/htdocs/people/sfwatkins/MERLOT/flattice/00lattice.html

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  10. Evan HarknettNovember 9, 2009 at 5:55 PM

    good site on crystal lattices
    http://hyperphysics.phy-astr.gsu.edu/HBASE/Solids/lattice.html

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  11. Ben SmithNovember 9, 2009 at 6:06 PM

    http://misterguch.brinkster.net/ionic.html

    Good site on Ionic Compounds

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  12. Griff MoranNovember 9, 2009 at 6:11 PM

    http://sciencespot.net/Media/chbondionic.pdf


    This is a worksheet that practices ionic bonding layouts

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  13. Glennjamin AdesojiNovember 9, 2009 at 6:42 PM

    discription of crystal lattice


    http://hyperphysics.phy-astr.gsu.edu/HBASE/Solids/lattice.html

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  14. Matt FarrellNovember 9, 2009 at 6:47 PM

    A site explaining ionic boding:
    http://library.thinkquest.org/3659/structures/ionic.html

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  15. Colby "Girlfraand" MabryNovember 9, 2009 at 6:51 PM

    here's a site that goes in depth about crystal lattices.

    http://www.chem.lsu.edu/htdocs/people/sfwatkins/ch4570/lattices/lattice.html

    and here's a good site about ionic compounds.

    http://misterguch.brinkster.net/ionic.html

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  16. Taylor AdkinsNovember 9, 2009 at 7:03 PM

    good site on compounds.http://www.angelo.edu/faculty/kboudrea/general/formulas_nomenclature/Formulas_Nomenclature.htm

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  17. Donnie SheaNovember 9, 2009 at 7:48 PM

    Interesting site about how ionic compounds are named:
    http://chemistry.about.com/od/nomenclature/a/nomenclature-ionic-compounds.htm

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  18. Charlie FisherNovember 10, 2009 at 5:34 AM

    this website explains and gives examples of crystal lattice

    ReplyDelete
  19. Charlie FisherNovember 10, 2009 at 5:34 AM

    http://cst-www.nrl.navy.mil/lattice/

    ReplyDelete

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