1. Elements in the same period (row) are filling up the same energy level as you move from left to right.
2. Vertical columns are called groups.
3. Chemical bonds have similar properties.
4. Valence electrons are the electrons in the outermost shell of the atom.
5. All halides have the same number of valence electrons.
6. The noble gases have full outer electron shells, which makes them inert or non-reactive.
7. Noble gases are elements that have a full valence electron shell.
8. Noble gases are also called inert gases because they don't react with other elements.
9. The alkali family is the most active metals.
10. Alkali metals are the elements in the 1st column.
Parent Tip: Review the logic above to help your child master the concept of periodic table worksheet key.
