https://ptable.top/en/element/9
Fluorine (F) — Periodic Table of Elements | Properties, Uses & History | PeriodicTable
Fluorine (F) in the periodic table of elements: atomic number 9, halogen, period 2, group 17. Electron configuration [He] 2s² 2p⁵, atomic weight 18.998 u. Uses:
table of elementsfluorineperiodicpropertiesuses
https://miktex.org/packages/pgf-periodictable
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