Electronic configuration of four elements A , B , C and D are given below : (A) 1 ~s ^2 2 ~s ^2 2 p ^3 (B) 1 ~s ^2 2 ~s ^2 2 p ^4 (C) 1 ~s ^2 2 ~s ^2 2 p ^5 (D) 1 ~s ^2 2 ~s ^2 2 p ^2 Which of the following is the correct order of increasin

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Electronic configuration of four elements A , B , C and D are given below : (A) 1 ~s ^2 2 ~s ^2 2 p ^3 (B) 1 ~s ^2 2 ~s ^2 2 p ^4 (C) 1 ~s ^2 2 ~s ^2 2 p ^5 (D) 1 ~s ^2 2 ~s ^2 2 p ^2 Which of the following is the correct order of increasing electronegativity (Pauling's scale)?

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Correct answer: D. D < A < B < C

N :-1 ~s ^2 2 ~s ^2 2 p ^3 (Electronegativity .=3 ) O :-1 ~s ^2 2 ~s ^2 2 p ^4 (Electronegativity =3.5 ) F :-1 ~s ^2 2 ~s ^2 2 p ^5 (Electronegativity =4 ) C :-1 ~s ^2 2 ~s ^2 2 p ^2 (Electronegativity =2.55 ) Correct order = C B A D

Electronic configuration of four elements A , B , C and D are given below : (A) 1 ~s ^2 2 ~s ^2 2 p ^3 (B) 1 ~s ^2 2 ~s ^2 2 p ^4 (C) 1 ~s ^2 2 ~s ^2 2 p ^5 (D) 1 ~s ^2 2 ~s ^2 2 p ^2 Which of the following is the correct order of increasing electronegativity (Pauling's scale)?

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