Which one of the following ions is not iso-electronic with F- ? 1. O2

1.	Which one of the following ions is not iso-electronic with F- ? 1. O2-2. Na+3. Ne4. N-
Answer» Correct Answer - Option 4 : N^- Isoelectronic refers to two atoms, ions, or molecules that have the same electronic structure and the same number of valence electrons. N- has 2+5 = 7 electrons. F- has 9+1 = 10 electrons thus N- is not iso-electronic with F- . Atoms or ions with the same electronic configurations are said to be isoelectronic to each other or to have the same isoelectronicity. For example, the following three ions N3-, O2-, F- have 10 electrons. Thus these ions have the same electronic configuration. N3- has 7+3 = 10 electrons O2- has 8+2= 10 electrons F- has 9+1 = 10 electrons Ne has 2+8 = 10 electrons Na+ has 2+8 = 10 electrons

Which one of the following ions is not iso-electronic with F- ? 1. O2-2. Na+3. Ne4. N-

Answer» Correct Answer - Option 4 : N^-

Isoelectronic refers to two atoms, ions, or molecules that have the same electronic structure and the same number of valence electrons.
N- has 2+5 = 7 electrons.
F- has 9+1 = 10 electrons thus N- is not iso-electronic with F- .

Atoms or ions with the same electronic configurations are said to be isoelectronic to each other or to have the same isoelectronicity.
For example, the following three ions N3-, O2-, F- have 10 electrons. Thus these ions have the same electronic configuration.
- N3- has 7+3 = 10 electrons
- O2- has 8+2= 10 electrons
- F- has 9+1 = 10 electrons
- Ne has 2+8 = 10 electrons
- Na+ has 2+8 = 10 electrons

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Which one of the following ions is not iso-electronic with F- ? 1. O2-2. Na+3. Ne4. N-

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