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19 November, 23:04

As you move across the period on the periodic table what pattern can be described about the electron configurations?

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  1. 19 November, 23:22
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    Elements in the same period have same number of electronic shell and electron is increased by one in every coming element with in same electronic shell.

    Explanation:

    Consider the second period of periodic table. This period consist of eight elements lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine and neon.

    Electronic configuration of lithium:

    Li₃ = [He] 2s¹

    Electronic configuration of beryllium:

    Be₄ = [He] 2s²

    Electronic configuration of boron:

    B₅ = [He] 2s² 2p¹

    Electronic configuration of carbon:

    C₆ = [He] 2s² 2p²

    Electronic configuration of nitrogen:

    N₇ = [He] 2s² 2p³

    Electronic configuration of oxygen:

    O₈ = [He] 2s² 2p⁴

    Electronic configuration of fluorine:

    F₉ = [He] 2s² 2p⁵

    Electronic configuration of neon:

    Ne₁₀ = [He] 2s² 2p⁶

    All these elements present in same period having same electronic shell and number of electron increased by 1.
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