How Valence Electron Counts Decide Lewis Dot Symbols for Atoms and Monatomic Ions

A Lewis dot symbol shows one dot per valence electron, so the group number sets the dot count for a neutral main-group atom and the electron gain or loss sets it for a monatomic ion.

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Select the Atoms or Ions with Valid Lewis Dot Structures: Cl, Na, Mg, Ca, K, Br, Sr, and F