Choose the correct order of atomic radii of fluorine and neon (in pm) out of the options given below and justify your answer.

 (i) 72, 160

(ii) 160, 160

(iii) 72, 72 

(iv) 160, 72 

Answers (1)

The answer is the option (i) 72, 160

Explanation: The atomic size generally decreases across a period for the elements of the second period because within one period there are the same number of shells in all the elements within that period but the nuclear charge increases while going along the period and hence the electrons in the shells are attracted more towards the nucleus thereby reducing the atomic radii.

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