Students demonstrate atomic theory using the economy atomic model. They use the physical model to represent atoms of different elements, evaluate the stability of randomly generated isotopes, and predict the formation of ions for a specific element. Great job!

The plastic tube represents the nucleus. The red pom pom is 1 proton. The white pom pom is missing because this isotope contains 0 neutrons. The white cap is on the tube to indicate that this isotope is Stable, as shown on the Isotope Stability Table. There is 1 black pom pom to show the 1 electron for this atom which is balanced protons to neutrons for an overall charge of +1.

The plastic tube has 36 pom poms in the nucleus. There red pom poms have 18 protons. The white pom poms have 18 neutrons. The white cap is on the tube to indicate that this isotope is Stable, as shown on the Isotope Stability Table. There are 18 black pom poms to show the 18 electrons for this atom which is balanced protons to neutrons for an overall charge of +1.

The plastic tube has 35 pom poms in the nucleus. There red pom poms have 17 protons. The white pom poms have 18 neutrons. The white cap is on the tube to indicate that this isotope is Stable, as shown on the Isotope Stability Table. There are 18 black pom poms to show the 18 electrons for this atom which is Not balanced protons to neutrons for an overall charge of -1.