Solid Metallic Elements
IntroductionSolid Metallic elements play a very important role in the everyday lives of each and every one of us. Many of these things have to do with the chemistry behind them. This includes melting points, hardness, and tensile strength. Also, many of these elements are good conductors of heat and electricity. Heading #1 The term solid metallic elements refers to the element being a solid at 298 K. All metals except for Hg are solid at that temperature; however, there are also a few with relatively low melting points that put them right on the edge. These include Cs (301 K) and Ga (303 K). Most of these metals crystallize with ccp, hcp, or bcc lattices. Many of these solid metallic elements are polymorphic, meaning that their structure changes depend on the conditions of the temperature and/or pressure. Below here is a chart of the melting points of the solid metallic elements. Most of these elements have high melting points, allowing them to be solids at room temperature, rather than liquid (with the exception of Mercury).
The Solid metallic elements in this periodic table go from the elements include the dark blue (group 1), the red (group 2), the yellow (transition metals), and the light blue (metalloids).
Although these pictures above help to see the relationships between all the solid metallic elements, there is an even better picture found in the Inorganic Chemistry textbook, cited below. Another important factor besides melting point, is the crystallization structure of the metals. The first type is a CCP (cubic close packing) crystallization, also called face centered cubic, shown below. This is the most common type of crystals and minerals.
this image can be found at seas.upenn.edu The next type of crystal structure is hexagonal close packed (HCP).
this image can be found at seas.upenn.edu The last type of crystal structure is body centered cell (BCC).
this image can be found at mrsec.wisc.edu To sum up all the information above, a useful periodic table is shown below and can be found at http://en.wikipedia.org/wiki/Periodi...tal_structure)
References
Outside LinksProblems1.) Sort the following elements in order by lowest melting point to highest melting point: Fe, Db, Os, Pt, Ti 2.) Explain why solid metallic elements are important in our daily lives. 3.) Of the three crystallization structures, which has the highest packing efficiency. 4.) Name the crystallization structure for each of the following elements: Ag, Au, Al, Pb, Cr 5.) Which solid metallic element is the most abundant on Earth. Answers1.) The elements are arranged from highest to lowest melting point Fe (1536 C), Ti (1670 C), Pt (1770 C), and Os (3025 C). No melting point could be found for Db. 2.) Solid metallic elements are important in our everyday lives because we use the in so many ways such as in the construction and support of buildings, automotives, ships. etc. The elements play a vast role in our lifes and quite frankly are essential in the sense of society and the way we live. 3.) This question can simply not be answered because the required images that are needed to solve it are not present and so this question cannot be answered. (consider acquiring images or choosing a different question) 4.) Ag is face centered cubic, Au is face centered cubic, Al is face centered cubic, Pb is face centered cubic and Cr is body centered cubic. 5.) Aluminum is the most abundant metallic element on earth. This light metal comprises more than eight percent of the earth's crust. You must login to post a comment. |
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