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Question
In which of the following pairs, the ions are iso-electronic?
(i) \[\ce{Na^{+}, Mg^{2+}}\]
(ii) \[\ce{Al3^{+}, O-}\]
(iii) \[\ce{Na+ , O2-}\]
(iv) \[\ce{N3-, Cl-}\]
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Solution
(i) \[\ce{Na^{+}, Mg^{2+}}\]
(iii) \[\ce{Na+ , O2-}\]
Explanation:
Isoelectronic species are those species that possess the same number of electrons.
Here both \[\ce{Na+, Mg^{2+}}\] possess 10 electrons and both \[\ce{Na+ , O2-}\] possess 10 electrons.
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