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What are the atomic numbers of element whose outermost electrons are represented by

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

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

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