Fluorine, shown with significant periodic table row and column neighbors. (landscape version)
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 Fluorine with significant periodic table neighbors.svg: 
Electron shell 009 Fluorine (diatomic nonmetal) - no label.svg:
Fluorine_with_significant_periodic_table_neighbors.svg: *Periodic_table.svg: Cepheus
derivative work: Begoon
derivative work: Begoon