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which of the following species are isoel...

which of the following species are isoelectronic ?
(i) `Ne` ,(ii) `O^(2-)` , (iii) `Mg^(2+)` , (iv) `F`
(v) `Al^(3+)` , (vi) `Cl^(ө)` , (vii) `K` , (viii) `Na`
Arrange them in decreasing order of their size.

Text Solution

AI Generated Solution

To determine which of the given species are isoelectronic and to arrange them in decreasing order of their size, we will follow these steps: ### Step 1: Identify the number of electrons in each species - **Neon (Ne)**: Atomic number = 10, so it has 10 electrons. - **Oxygen ion (O²⁻)**: Atomic number = 8, but it gains 2 electrons, so it has 10 electrons. - **Magnesium ion (Mg²⁺)**: Atomic number = 12, loses 2 electrons, so it has 10 electrons. - **Fluorine (F)**: Atomic number = 9, so it has 9 electrons. - **Aluminium ion (Al³⁺)**: Atomic number = 13, loses 3 electrons, so it has 10 electrons. ...
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