Question

₇N, ₆C, ₈O, ₅B, ₁₃A1 Which is the most electronegative element among these? Write down the electronic configuration of the elements from the given atomic numbers. Answer the question with explanation

Answer 1

Among of these⇒  ₇N, ₆C, ₈O, ₅B, ₁₃Al . The most electronegative element is Oxygen (₈O).

Before discussing why ? First we must know what is Electronegativity ?

Electronegativity :- The atom which attract the bonding pair of electron or capable to get electrons are known as electronegative atoms. The phenomenon is known as electronegativity.

The correct order of electronegativity ⇒  O  > N > C > B > Al


Reason/Explanation :-

(i) Electronegativity Increases when we move left to right from a period. 
(ii)Electronegativity decreases when we move down to the group.
By this way we get the correct order of electronegativity{O  > N > C > B > Al }


Electronic Configuration :-

Boron (B⁵) -------→ 1s²,2s²,2p¹

Carbon(C⁶)------→1s²,2s²,2p²

Nitrogen(N₇)-----→1s²,2s²,2p³

Oxygen(O⁸)------→1s²,2s²,2p⁴

Aluminum(Al¹³)--→1s²,2s²,2p⁶,3s²,3p¹


Hence,Among of these Oxygen is the most electronegative element.


Hope it Helps. :-)