Background:

When the elements are arranged in order of increasing atomic number, they exhibit a periodic recurrence of properties.  Elements in the same group in the periodic table tend to have similar physical and chemical properties.  These similarities are due, in large part, to similarities among the electron configurations of the elements in a group.  You can find periodic trends in certain properties, such as density, among the elements within a given group.

In this experiment, you will:

• Investigate the variation in density among three Group 4A elements.  
• Use your results to predict the density of another Group 4A element.