Part B In the PhET simulation under the Isotopes tab, click on the yellow cells corresponding to elements in the periodic table. Then, add or remove neutrons by dragging the gray particles either to the nucleus of the atom or to the bin beside the atom to obtain the specified isotope, determine which isotopes of the given elements are stable Drag the appropriate items to their respective bins. View Available Hint(s) Hint 1. How to approach the problem Hint 2. Match the given Isotope with its symbol Hint 3. Identity how many neutrons must be removed Reset Help N N N Belo Stable Unstable