pertable - Periodicity: Elemental Trends in the Periodic...

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1 of 6 Periodicity: Elemental Trends in the Periodic Table Objective: The purpose of this laboratory exercise is to provide an opportunity for students to gain an understanding of the periodic law and its fundamental principles. Using the “family concept” of periodic trends, a periodic table of elements that were recently discovered in the Armstrong Universe will be constructed. Safety: . Eye protection must be worn at all times in the laboratory. Background: The periodic table contains a wealth of information on atomic structure, elemental classification and the chemical/physical property relationships among elements. The success of the periodic table can be attributed to its ability to predict undiscovered elements and their placement within the table based on existing elemental patterns and characteristics. Although many scientists, such as Johann Dobereiner, John Newlands and Lothar Meyer, contributed information towards the understanding of patterns and characteristic relationships among the elements, Historically, Dmitri Mendeleev, a 19 th century Russian professor of Chemistry, has been acknowledged as the discoverer of the Periodic Law and the developer of the precursor of today’s periodic table. Mendeleev’s understanding of elemental patterns and characteristics allowed him to systematically arrange the 60+ known elements of his time into a table format that reflects their physical properties and atomic
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pertable - Periodicity: Elemental Trends in the Periodic...

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