'(<a href="http://www.j-archive.com/media/2006-03-30_DJ_08.jpg" target="_blank">Jon of the Clue Crew shows the periodic table on a monitor.</a>)  The columns on the periodic table are of atoms with the same configuration of these  as they fill the atom's shell'
electrons
THE PERIODIC TABLE OF ELEMENTS: The columns on the periodic table are of atoms with the same configuration of these  as they fill the atoms shell
The columns on the periodic table are of atoms with the same configuration of these  as they fill the atom's shell
The columns on the periodic table are of atoms with the same configuration of these  as they fill the atom's shell
THE PERIODIC TABLE OF ELEMENTS
electrons
THE PERIODIC TABLE OF ELEMENTS