write the valence shell electronic configuration of 1st, 7th and 8th groups.
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Write the valence electron configuration of each element by first indicating the filled inner shells using the symbol for the nearest preceding noble gas and then listing the principal quantum number of its valence shell, its valence orbitals, and the number of valence electrons in each orbital as superscripts
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Explanation:
1st - 1s¹
7th - 1s², 2s², 2p³
8th - 1s², 2s², 2p⁴
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