NASA
Nasa: The Space Place: Ions in Action
The page from NASA's The Space Place describes a simple activity, charging a balloon and making it move small pieces of paper. It then goes on to give an excellent explanation of how the activity works, and how it involves ions. This...
Educaplus (Jesús Peñas Cano)
Educaplus: Particulas De Los Atomos E Iones [In Spanish]
Use this interactive activity to learn how to interpret the symbols of different elements. You can check your work at the end.
Davidson College
Davidson College: Plot of First Ionization Energy and Atomic Number
Here you will find a group of images and graphs which plot covalent radii, first ionization energy, and electron affinity vs. atomic number.