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Families: Grouping of the Periodic Table
- Elements within a column are considered “families.”
- They have similar chemical and physical properties.
- They all have the same number of electrons in the outermost shell (energy level).
- Families of the periodic table
- Alkali metals (column 1/Group number 1A)
- Alkaline earth metals (column 2/Group number 2A)
- Halogens (column 17/Group number 7A)
- Noble/inert gases (column 18/Group number 8A)