Students will use their knowledge of atomic structure to build 15 models. Students will drag a proton and neutron onto the atom and then type in the number of each atomic particle. Next, students will drag the correct number of electrons onto the atom. Students have to determine the mass number, atomic number, the number of protons, electrons, and neutrons.
 
There are 3 versions. The 1st and 2nd versions have the atom set as the background, so students cannot move the atom diagram. The 3rd version allows students to construct the atom without the aid of the atom as a background.