Answer:
When Potassium react with fluorine potassium fluoride is formed.
Explanation:
The elements of group 17 are called halogens. These are six elements Fluorine, Chlorine, Bromine, Iodine, Astatine. Halogens are very reactive these elements can not be found free in nature.
When halogen elements react with group one metals they form halide salts.
Alkali metals have one valance electron and halogens needed one electron to complete the octet thus alkali metals loses one electron which is accepted by halogens atom and form ionic compound called halide salts.
When Potassium react with fluorine potassium fluoride is formed.
Chemical equation:
2K + F₂ → 2KF
