Question

what is fluorine?
please help me​

Answer 1

Answer:

the chemical element of atomic number 9, a poisonous pale yellow gas of the halogen series. It is the most reactive of all the elements, causing very severe burns on contact with skin.

Answer 2

Answer:

Fluorine is a chemical element with the 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, as it reacts with all other elements, except for argon, neon, and helium.

Symbol: F

Atomic number: 9

Atomic mass: 18.998403 u

Electron configuration: [He] 2s22p5

Electronegativity: 3.98

Van der Waals radius: 147 pm