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Group 17: The Halogens

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    1. 1.  
    maybe add the definition (background) of the name halogen. edited 11:03, 3 Dec 2008
    Posted 11:01, 3 Dec 2008
     
    You might want to break up your introduction a little. I think you're trying to get too many ideas across in one paragraph; some of the information can be used for later when you're expanding on specific elements.
    Posted 04:29, 4 Dec 2008
     
    Nice descriptions of each of the elements in the halogen group. Maybe try to add some pictures of the gas' colors...
    Posted 21:49, 4 Dec 2008
     
    I think you have a very detailed and thorough content. Although I will suggest maybe change the level of some of the headings? For example, the big points like "Content", "outside link"...etc can use "Heading2" in the editor, while the smaller points inside the content: like "Elements", "periodic trends"...etc can use "Heading3" or "Heading4". Doing so will not only make your page more readable, it will be easier to edit it too, since it will create an edit point(place you can just click to edit that particular section instead of going all the way up the page and click on "edit page").
    Posted 00:32, 5 Dec 2008
     
    Very informative! Under electronegativity trend, you explained that "atoms at the top of the group have fewer electrons." What electrons are you talking about? Are they valence electron or total number of electron? Because if they are valence, then why don't lithium has higher electronegativity since it has fewer electrons? Trends are helpful to memorize the basics but they have no emphasis on how they work.

    Keep up the good work :)
    Posted 08:51, 5 Dec 2008
     
    Very informing module. I would put some more practice problems up involving halogens for the readers sake.
    Posted 15:24, 5 Dec 2008
     
    Katherine Barrett? says:
    This is really good, but in the section where you discuss Hydrogen Halides and Halogen Oxoacids, you might want to briefly explain an oxoacid, similarly to how you briefly explained halides.
    Posted 17:51, 5 Dec 2008
     
    This module is very good, the information is very helpful, and like others have said informative...but I think your organization with your pictures and stuff can be a little better. overall great job!
    Posted 21:20, 5 Dec 2008
     
    Reviewer Name: Cathy Nguyen

    1. Synopsis: Halogens are found on holds one less valence electron to make a full octet. This characteristic of the halogens makes them more reactive as opposed to noble gases that have full octets. The charts gave useful information such as the atomic number, mass number, and what element. It gives a chart on the electronic configuration on each halogen.Fluorine is the most reactive halogen while astatine is the least. The module then explains the different elements and the rules that go along with it. It talks about many topics that are applicable in certain elements, such as electronegativity, oxidation states, short-life, isotopes and more. Then it discusses periodic trends such as the melting points, boiling points, atomic radii, ionization energy, electronegativity, and electron affinity. For melting and boiling points, it increases down the group, atomic radii increases down the group, whereas ionization energy, electronegativity, and electron affinity decreases down the group. Hydrogen halides are halogens that react with another element which results in a binary compound. Halogen oxoacids forms with hydrogen, oxygen and halogen atoms to make an acid. Room temperature on halogens causes the states and appearances to be different. For example, for iodine it is sold at room temperature and its appearance is violet. It also gave another chart based on the oxidation states in compounds. Finally, the module concluded with the applications of Halogens. For example, chlorine has various uses in daily life, which fights everyday colds or diseases like diabetes.
    2. Keywords: Bolded Keywords: Halogens, short-lived isotopes, iodine. No plagiarism.

    3. Review Details:
    This module was very informative. It provided logical steps that helped students understand the topic. The module also provided graphs that clarified the topic. It was very thorough in all the explanations. The charts were extremely useful. Many students who learn better visually will find these charts to be beneficial. Overall, it was a very good, thorough and clear module. The English was correct in terms of the proper punctuation and spelling and the length was sufficient.

    4. Edit on Module: changed "increase" to "increases" to keep it consistent with the other verbs that described the periodic trends. edited 11:49, 4 Dec 2009

     

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