See image | AITS & Test Series — Chem-Mantra

AITS & Test SerieshardNUMERICAL

Question

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Answer: 1

💡 Solution & Explanation

According to given data four atoms are F,Ne,Na and Mg which have atomic number 9,10,11 and 12. Hence F has 1 unpaired electron in 2p subshell.

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