Fluorine (F), element 9 – Learn Acer periodic table

Nonmetal, atomic number 9.

Fluorine is a chemical element with symbol F and atomic number 9. It is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. As the most electronegative element, it is extremely reactive:almost all other elements, including some noble gases, form compounds with fluorine.

Symbol F. Atomic mass 18.9984031636 u. Group 17, period 2. Electron configuration [He] 2s2 2p5. Electrons per shell 2, 7. State at room temperature: Gas. Melting point -219.7 °C, boiling point -188.1 °C. Discovered by André-Marie Ampère.

Element data from Wikipedia, CC BY-SA 3.0.

Fluorine (F), element 9 – Learn Acer periodic table

Fluorine

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