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JEE MAIN - Chemistry (2023 - 8th April Morning Shift - No. 3)

The correct order of electronegativity for given elements is:
$$ \mathrm{C}>\mathrm{P}>\mathrm{At}>\mathrm{Br}$$
$$\mathrm{Br}>\mathrm{C}>\mathrm{At}>\mathrm{P}$$
$$\mathrm{Br}>\mathrm{P}>\mathrm{At}>\mathrm{C}$$
$$\mathrm{P}>\mathrm{Br}>\mathrm{C}>\mathrm{At}$$

Explanation

Electronegativity is a measure of an atom's ability to attract shared electrons to itself. On the periodic table, electronegativity generally increases as we move from left to right across a period due to increase in effective nuclear charge.

Here are the Pauling electronegativities for the elements:

  • Carbon (C): 2.55

  • Phosphorus (P): 2.19

  • Astatine (At): 2.2

  • Bromine (Br): 2.96

Based on these values, the correct order of electronegativity from highest to lowest is Br > C > At > P.

Therefore, Option B is the correct answer:

Br > C > At > P

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