Foundation
Periodic Table
Read the periodic table as a map of electron structure, element families, reactivity, and useful trends rather than a list to memorize.
Learning outcomes
- Locate periods, groups, and element families
- Explain why valence electrons drive chemical behavior
- Compare metals, nonmetals, metalloids, halogens, and noble gases
- Use trends to predict relative size, reactivity, and electronegativity
Visual notes
Elements in a group often share valence electron patterns.
Periods show the number of occupied electron shells in a simple model.
Noble gases are stable because their outer shell is filled.