In a period electronegativity is highest for

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Chalcogen

Halogen

Inert gas

Alkali metal

answer is B.

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Detailed Solution

Small size of halogens, leads to the attraction of electron fast and thus increase in value electronegativity.

As we go from left to right in the periodic table, the electronegativity of elements increases.

In a period electronegativity is highest for halogens.

Halogens have relatively small atomic radii compared to many other elements. Small atomic size means that the outermost electrons are closer to the nucleus, leading to a stronger attraction for electrons.

Halogens have one electron less than a full outer electron shell. To achieve this stable configuration, halogens readily accept an additional electron when bonding with other elements.

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