F2 can’t be made by chemistry — every solvent reacts with it — so anhydrous HF is dissolved in molten KF·2HF at ~100 °C and electrolyzed in a nickel cell; F2 comes off the anode.
Research Elements F · atomic number 9 Halogen · period 2, group 17 [He] 2s2 2p5 Shells: 2, 7 Valence electrons: 7 in the outer shell (2s2 2p5) Green dots are the outer shell's s and p electrons. Softer green dots are the d electrons of transition metals, and the d and f electrons of lanthanides and actinides: they often take part in bonding, but not always. Grey dots are the core. Ground-state configuration from the NIST Atomic Spectra Database (A. Kramida, Yu. Ralchenko, J. Reader and the NIST ASD Team). Abundance is the mole fraction of the element found as that isotope on Earth; digits in parentheses are the uncertainty in the last digits. Masses and abundances from NIST, Atomic Weights and Isotopic Compositions (J. S. Coursey, D. J. Schwab, J. J. Tsai and R. A. Dragoset, National Institute of Standards and Technology).Fluorine
Electrons
How it's obtained
Natural isotopes
Isotope Relative atomic mass Abundance 19F 18.99840316273(92) 1