After N , atomic size increases for O and decreases for F ,Why?
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Atomic size decreases across a period (as effective nuclear charge increase).
(NOTE: Do not take inert gases in the consideration)
Li>Be>B>C>N>O>F
tanu8523:
but why increases for O
size of N is smaller than O
Exactly! Size of N is smaller than O. So we know that N has half filled electronic configuration. So N is more stable. Since N is stable it will have more effective nuclear charge meaning its atomic size decreases (atomic size is inversely proportional to effective nuclear charge).
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