Physicists have measured how much energy it takes to ionize astatine, the rarest naturally occurring element on Earth, filling in a missing piece of the periodic table.

This lesson utilizes an adaptation of the board game Periodic: A Game of the Elements to help students better understand general periodic trends. This adaptation was created for use during one ...

In order to perform spectroscopy of one of these elements, actinium, the study team developed a new, highly sensitive technique based on the well-known technique of laser ionization, but used it in ...

Learn about the periodic table of elements. Find lesson plans and classroom activities, view a periodic table gallery, and shop for periodic table gifts.

In an earlier paper, published in 2013 in the journal Nature Communications, the ISOLDE team measured the ionization energy of astatine: how difficult it is to remove an electron from the atom.