Identify from the following the isoelectronic species : Ne, O^(2-) , Na^+ OR Ar, Cl^(2-) , K^+
Identify from the following the isoelectronic species :
Ne, O2, Na+ OR Ar, Cl2-, K+
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Atoms and ions having the same number of electrons are isoelectronic.
| Species | No. of electrons |
| Ne | 10 |
| O2- | 8 + 2 = 10 |
| Na+ | 11 – 1 = 10 |
| Ar | 18 |
| Cl2- | 17 + 2 = 19 |
| K+ | 19 – 1 = 18 |
Hence,
Ne, O2-, Na+ are isoelectronic species.
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