What are the atomic numbers of element whose outermost electrons are r – InterviewSolution

1.

What are the atomic numbers of element whose outermost electrons are represented by (a) 3s1, (b) 2p3 and (c) 3p5?

Answer»

Species	Outer electronic configuration	Complete electronic configuration	Total No. of electron	Atomic number
(a)	3s¹	1s¹ 2s² 2p⁶3s¹	11	11
(b)	2p3	1s² 2s² 2p³	7	7
(c)	3d⁶	1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁶	26	26

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