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  • Three elements X, Y and Z have atomic numbers 7, 8 and 9 respectively. (a) Arrange them in the decreasing order of their atomic radii. (b) Which of the three is most electronegative ? Why ? (c) Write the formula of compound formed

Three elements X, Y and Z have atomic numbers 7, 8 and 9 respectively.
(a) Arrange them in the decreasing order of their atomic radii.
(b) Which of the three is most electronegative ? Why ?
(c) Write the formula of compound formed between
        (i) X and Y
       (ii) X and Z

 

 

 

 
 
 
 
 

Answers (1)

Three elements X, Y and Z have atomic numbers 7, 8 and 9 respectively.
(a) Decreasing order of their atomic radii is X > Y > Z

(b) Z is most electronegative because it needs only one electron to attain stable configuration. 


(c) Formula of compound formed between
        (i) X and Y is X2Y3

       (ii) X and Z is XZ3

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Safeer PP

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