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    hjin_19's Avatar
    hjin_19 Posts: 2, Reputation: 1
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    #1

    Dec 15, 2007, 05:02 PM
    Periodic trends and electron configuration?
    Sodium forms a +1 ion while fluorine forms a -1 ion. Please explain why they do not form +2 and -2 ions, respectively. Use electron configurations and periodic trends to support your answer.
    itsme_vipsdude's Avatar
    itsme_vipsdude Posts: 29, Reputation: 0
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    #2

    Dec 16, 2007, 06:40 AM
    It is because sodium and fluorine are closer to the electronic configuration of neon(1s2 2s2 2p6 ).
    Sodium---1s2 2s2 2p6 3s1
    Fluorine---1s2 2s2 2p5
    Thus it is easy to achieve the electronic configuration of neon rather than anything else so they loose and gain one electron easily to become stable
    latina14's Avatar
    latina14 Posts: 1, Reputation: 1
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    #3

    Dec 18, 2007, 04:11 AM
    When the magnesium was added to water and phenolphtalein, what was observed?
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