'(<a href="http://www.j-archive.com/media/2002-11-28_J_20.jpg" target="_blank">Sofia presents the clue from the blackboard.</a>) By adding a neutron, you can get this different form of a chemical element'
an isotope
HOW AM I DOING?: By adding a neutron, you can get this different form of a chemical element
By adding a neutron, you can get this different form of a chemical element
By adding a neutron, you can get this different form of a chemical element
HOW AM "I" DOING?
an isotope
HOW AM "I" DOING?