F is the most electronegative atom on the Periodic Table, and electronegativities rise from the bottom to the top of the Group.
In comparison to water, the halogens are substantially more soluble in organic solvents like hexane. Since neither hexane nor the halogens are polar, van der Waals dispersion forces are the only intermolecular interactions acting between them.
The capacity of an atom to attract electrons to itself is known as electronegativity. Halogens have a strong attraction to electrons and hence have high electronegativity values because they only require one electron to complete an octet.
Although polar by nature, alkyl halides are very insoluble in water.
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