Have your students go through the steps of identifying valence electrons of different elements and how this determines the groups to which it will bond. This PDF download includes the activity worksheet and a key.
- Use the periodic table as a model to predict the relative properties of elements based on the patterns of electrons in the outermost energy level of atoms.
- The periodic table orders elements horizontally by the number of protons in the atom;s nucleus and places those with similar chemical properties in columns. The repeating patterns of this table reflect patterns of outer electron states.