Bean Bag Isotopes

In this lab experience, students investigate the mass and relative abundance of isotopes for the “bean bag” element (symbol, Bg) and calculate the atomic mass of this element. This lab involves modeling the structure of the atom; specifically modeling isotopes of an arbitrary element. Students should come to understand that not all atoms of an element are the same when they observe the bag of Bg element. The Bg element is made up of several different types of beans. Students identify the different beans as isotopes in the element Bg. Students should separate, count and weigh the different isotopes and have the opportunity to practice percent abundance calculations. Ultimately, student calculate the atomic mass of element Bg.