This interactive, scaffolded activity allows students to build an atom within the framework of a newer orbital model. It opens with an explanation of why the Bohr model is incorrect and provides an analogy for understanding orbitals that is simple enough for grades 8-9. As the activity progresses, students build atoms and ions by adding or removing protons, electrons, and neutrons. As changes are made, the model displays the atomic number, net charge, and isotope symbol. Try the "Add an Electron" page to build electrons around a boron nucleus and see how electrons align from lower-to-higher energy. This item is part of the Concord Consortium, a nonprofit research and development organization dedicated to transforming education through technology. The Concord Consortium develops deeply digital learning innovations for science, mathematics, and engineering. The models are all freely accessible. Users may register for additional free access to capture data and store student work products.

Do you think we can blow up a balloon using only ingredients from the pantry? Using simple, safe, at-home materials, we will explore the concepts of pH and acid-base chemistry and have some fizzy fun! With their signature gas-producing fizz, the acid-base reactions in this episode are both fun and functional. Not only will the reaction blow up a balloon, it also makes your bath bomb fizz in the tub. Join Miss America 2020 to cook up some science in your kitchen, and learn more about the chemistry of fizzy fun! Developed for students in grades 6- 10.