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Which element has the highest electronegativity?
Fluorine
Oxygen
Chlorine
Nitrogen
Fluorine
Fluorine is the most electronegative element on the periodic table, with a value of 3.98 on the Pauling scale. This high electronegativity is due to its small atomic radius and high effective nuclear charge, which allows it to attract shared electrons in a chemical bond very strongly.
Fluorine is the most electronegative element on the periodic table, with a value of 3.98 on the Pauling scale. This high electronegativity is due to its small atomic radius and high effective nuclear charge, which allows it to attract shared electrons in a chemical bond very strongly.
Think of electronegativity like a strong magnet or a tug-of-war champion; fluorine pulls the shared rope of electrons much closer to itself than any other atom.
Remember the order of top electronegative elements using 'FON' (Phone): Fluorine, Oxygen, Nitrogen.
$chi_{F}$ = 3.98 тАФ Pauling electronegativity value for Fluorine
Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons. As you move from left to right across a period, electronegativity increases due to an increase in nuclear charge with a negligible increase in shielding. As you move down a group, it decreases due to increased atomic radius and shielding. Fluorine sits at the top right of the p-block, giving it the optimal combination of a tiny atomic radius and high nuclear charge.
Fluorine has the highest electronegativity value of 3.98 on the Pauling scale.
Electronegativity generally increases across a period from left to right and decreases down a group.
Oxygen is the second most electronegative element with a value of 3.44.
Determining bond polarity and dipole moments in covalent molecules.
Explaining strong hydrogen bonding in compounds like hydrogen fluoride (HF).
Noble gases generally do not have assigned electronegativity values because they do not readily form bonds under normal conditions.
Option B (Oxygen) is second highest (3.44), Option C (Chlorine) is 3.16, and Option D (Nitrogen) is 3.04.
A is correct тАФ Fluorine has the highest electronegativity among all elements on the periodic table with a Pauling value of 3.98.
Questions frequently test the trend of electronegativity or ask for the top three elements (FON); keep these in mind for hydrogen bonding and polarity questions.
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