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Question

Chemistry Question on p -Block Elements

Which one of the following is the most electronegative element configuration?

A

1s2,2s22p6,3s23p61 s^{2}, 2 s^{2} 2 p^{6}, 3 s^{2} 3 p^{6}

B

1s2,2s22p6,3s11 s^{2}, 2 s^{2} 2 p^{6}, 3 s^{1}

C

1s2,2s22p6,3s21 s^{2}, 2 s^{2} 2 p^{6}, 3 s^{2}

D

1s2,2s22p51 s^{2}, 2 s^{2} 2 p^{5}

Answer

1s2,2s22p51 s^{2}, 2 s^{2} 2 p^{5}

Explanation

Solution

Fluorine is the most electronegative element. Its atomic number is nine and hence its configuration is as F(9)=1s2,2s2,2p5F(9)=1 s^{2}, 2 s^{2}, 2 p^{5} Due to its configuration,
it has maximum effective nuclear charge, hence it shows maximum electro negativity.