Lab Periodic Table

Determining Periodic Relationships

In 1869, aware of the need to organize elements in a meaningful way, Dmitri Mendeleev developed a classification scheme based upon increasing molar mass.Elements that demonstrated similar patterns of chemical behavior were placed into one of eight groups. Members of these groups were displayed in vertical columns of his periodic table. Even thoughhis chart was incomplete, Mendeleev was able to predict the properties of elements yet to be discovered. Over the next two years, Mendeleev published modified versions of his original periodic table.Today's periodic table accommodates at least 49 additional elements. Although the scheme is based upon increasing atomic number, the arrangement of elements within the chart is similar inorganization to the table published by Mendeleev in 1871. Trends in the chemical and physical properties of elements may be seen as a periodic function of electron configuration.
This laboratoryexperiment is designed to help you to understand the organizational relationship of elemental properties known as the periodic relationship. These facts about the elements has been organized in what isknown as the Periodic Table. The hope is that you will employ a thought process similar to that of Mendeleev's when trying to organize the material presented herein.________________________________________________
Safety
Aprons and eye protection are not required during this experiment. Handle the index cards and paper with care. Do not write on the index cards. Put all cards back in thecontainer when you have completed the experiment.
_________________________________________________
Pre-lab Questions (to be answered prior to doing the lab in order that you get a sense of what youwill be doing but should be a part of your lab report that is to be handed in.

1. Why was the periodic table developed?

2. How was Mendeleev's scheme for listing elements different from...