Group 17 Elements

Understanding Electronegativity:
Electronegativity is the ability of an atom to attract a shared pair of electrons towards itself in a chemical bond.
In the periodic table, electronegativity:
• Increases across a period (left to right)
• Decreases down a group (top to bottom)

Halogens in the periodic table:
Group 17 (Halogens):
Fluorine > Chlorine > Bromine > Iodine

Among the given options:
• Iodine – lower electronegativity (large atomic size)
• Bromine – higher than iodine, but less than chlorine and fluorine
• Chlorine – very electronegative, but not the highest
• Fluorine – the most electronegative element in the entire periodic table with a value of 3.98 on the Pauling scale

Final Answer: Option 4: Fluorine