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30 July, 13:55

Which two ions have the same electron configuration?

A) Na + and O2 - B) Li + and F - C) Ca2 + and Br - D) Na + and O3-

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Answers (2)
  1. 30 July, 15:01
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    Explanation:sdadd

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  2. 30 July, 17:31
    0
    Answer: A) Na + and O2-

    Explanation:

    To know the electronic configuration, one has to determine the numbers of electrons present in each atom.

    Na + means a sodium atom that has lost one valence electron. A Sodium atom initially has 11 electrons, but having lost an electron making it 10 electrons remaining with electron configuration of 1s2 2s2 2p6.

    O2 - means oxygen atom that has gained two valence electrons. An oxygen atom initially has 8 electrons, having gained two electrons makes it 10 electrons with electron configuration of 1s2 2s2 2p6. same as Na+

    The purpose of gaining or losing electrons is to attain a stable duplet or octet structure.
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