Chemistry/Mendeleev

Science 10

Mendeleev’s Periodic  Table

In this activity you will be given a chart containing the properties of eighteen “known” elements or compounds and a set of ten “unknown” elements or elements.

QUESTIONS

1.	How were elements in Medeleev’s periodic table arranged?

2.	What is Medeleev’s periodic law?

3.	Why was Mendeleev able to predict the properties of elements which had not yet been discovered?

4. 	Do all the properties follow a smooth trend when comparing the elements or compounds in a family? Support your answer using data from your finished chart.

5.	You have been called in as a highly paid consultant to the Atomic Energy Commission to predict the properties of Element 114. Although this element has not been discovered, nuclear physicists are sure that they can make it some day soon. Your task is to predict as many as you can of the properties of Element 114, which will lie directly underneath the element lead (Pb) on the periodic table. They are paying you for every property you predict, so if not sure, make a good guess.