Which of the given elements A, B, C, D and E with atomic numbers 2, 3, – InterviewSolution

1.	Which of the given elements A, B, C, D and E with atomic numbers 2, 3, 7, 10 and 30 respectively belong to the same period?A. A, B, C B. B, C, D C. A, D, E D. B, D, E
Answer» The elements B(Lithium), C(Nitrogen), D(Neon) all lie in the same 2nd period.

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