In FI, the negative pole will be acquired by 
Further explanation:
The tendency of an atom to attract the shared electrons in the bond towards itself is known as electronegativity. The more electronegative atom will more attract the bonding electrons towards itself than the less electronegative one. Therefore the electrons will spend more time with the more electronegative atom than an electropositive atom. The electronegative atom will acquire the partial negative charge and the electropositive atom will acquire a partial positive charge.
Electronegativity trends in the periodic table:
Along the period, electronegativity increases due to the increase in the nuclear charge. This results in the strong attraction of electrons.
Down the group, electronegativity decreases due to increase in the size of elements. This results in lesser attraction between the nucleus and the electron.
Fluorine and iodine are present in the same group of the periodic table. Fluorine is the first member of this group, called the halogen group. Iodine lies below fluorine. In FI, fluorine is more electronegative than iodine, and therefore electrons will be more attracted towards fluorine rather than iodine. Hence fluorine forms the negative pole whereas iodine will form the positive pole.
Learn more:
1. Forces in ionic compounds:
2. Reason for the acidic and basic nature of amino acid:
Answer details:
Grade: High School
Subject: Chemistry
Chapter: Periodic classification of elements
Keywords: electronegativity, FI, fluorine, iodine, group, period, periodic table, negative, positive, negative pole, positive pole, halogen group, first member, electronegativity trends.
