SELECT * FROM question_mgmt as q WHERE id=3623 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=9 AND subId=16 AND chapterId=256 and ex_no='4' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 10th science Periodic Classification of Element nitrogen atomic number 7 and phosphorus atomic

Question:

Nitrogen (atomic number 7) and phosphorus (atomic number 15) belong to group 15 of the Periodic Table. Write the electronic configuration of these two elements. Which of these will be more electronegative? Why?

Answer:

 Element  K L M

 Nitrogen

 Phosphorus

 2 5

 2 8 5

Nitrogen is more electronegative than phosphorus. As we move down a group, the number of shells increases. Therefore, the valence electrons move away from the nucleus and the effective nuclear charge decreases. Resulting in a decrease in the tendency to attract electrons and hence electronegativity decreases.


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