The sodium ion is ISO electronic with:
Correct answer: D. F-
- A. N
- B. P-³
- C. K+
- D. F-
Explanation
O2-, F-, Na+ and Mg2+ are known as isoelectronic species as they all have the same no. of electrons(10).
This question appeared on the ETEA MDCAT 2009 paper, which you can sit online with every answer explained.
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About Electronic Configuration
Electronic configuration describes how electrons occupy shells, subshells and orbitals around an atom. Questions use the Aufbau principle, Pauli exclusion principle and Hund's rule to write configurations, identify valence electrons, form ions and explain periodic trends, including common exceptions such as chromium and copper.
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