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28 February, 01:53

Give the symbol for:

a. the cation possessing a positive one charge that is isoelectronic with argon.

b. the anion possessing a negative two charge that is isoelectronic with krypton.

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  1. 28 February, 02:21
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    a. K⁺

    b. Se²⁻

    Explanation:

    Isoelectronic species are those that have the same number of electrons.

    a.

    Ar has 18 electrons. K has 19 electrons, so when it loses 1 electron to form K⁺, it is isoelectronic with Ar.

    b.

    Kr has 36 electrons. Se has 34 electrons, so when it gains 2 electrons to form Se²⁻, it is isoelectronic with Kr.
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