1.

The atomic number of Nitrogen (N), Oxygen (O) and flourine (F) are 7, 8 & 9 respectively.1. What is the number of valence electrons in N & F?2. Name the element having smallest and largest atomic radii of any of the above three elements. Give reason for your answer.

Answer»

(i) Valence electron of N = 5

Valence electron of F = 7

(ii) Smallest radius = F

Largest radius = N

Reason: Atomic radius decreases from left to right across a period due to increase in the force of attraction between nucleus and valence electrons.



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