The elements in the periodic table are grouped by similar

Last updated: 8/4/2022

The elements in the periodic table are grouped by similar chemical properties, which come from the similarities in the arrangement of their electrons. These electron arrangements can be expressed as generic outer electron configurations, i.e., the electron configuration outside the noble gas core, for all periods in a group using n instead of a specific number. Similarly, the generic Lewis dot structures for each group can be drawn using X to represent a generic element symbol. Match each generic electron arrangement to the appropriate periodic group number. Note that not all of the electron arrangements must be used.