4).Among the elements 2He⁴ 7N¹⁴ 12 Mg²⁴ and 4Be⁸ the elements which belong to the same period in the modern periodic table are.
(A)2 He⁴and 4Be⁸
(B)7N¹⁴andBe8
IC)12 Mg²⁴ and2He⁴
(D)4 Beand¹² Mg ²⁴
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4).Among the elements 2He⁴ 7N¹⁴ 12 Mg²⁴ and 4Be⁸ the elements which belong to the same period in the modern periodic table are.
(A)2 He⁴and 4Be⁸
(B)7N¹⁴andBe8
IC)12 Mg²⁴ and2He⁴
(D)4 Beand¹² Mg ²⁴
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Answer:
Be And N belong to same period