Summary:
- Valence electrons are responsible for the chemical properties of elements.
- The number of valence electrons can be easily determined from the electron configuration.
- Electron dot diagrams are diagrams in which the valences electrons of an atom are shown as dots distributed around the element’s symbol.
- The Table below shows the electron dot diagrams for the entire second period.
- Most transition elements have twovalence electrons, though some that have unusual electron configurations have only one.
- The dot diagrams would be the same for each element in the representative element groups.