posted by keisha .
how many groups (families) are there n the periodic table
how many elements are in your periodic table
what is the basic theme of organization in the periodic table
This would be a good time to look at your periodic table. If you don't have one, look in your text. If you forgot your text, here is on on-line.
How many elements? Look on your chart.
The basic theme is that elements are arranged in order of their increasing atomic number from left to right and by similar chemical properties in columns.