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Question

What is the electron configuration of sodium ion?


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Solution

Electronic configuration: The arrangement of electrons into the orbitals of an atom using some fundamental principle is called its electronic configuration.

Electronic configuration of Sodium (Na):

  • Sodium is an alkali metal having atomic number 11.
  • Therefore, the electronic configuration will be 1s22s22p63s1.

Electronic configuration of Sodium-ion (Na+):

  • The sodium atom loses one electron to attain a noble gas configuration and form a sodium ion.
  • Therefore, the electronic configuration for sodium-ion will be 1s22s22p6.

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