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NEETChemistryClassification of Elements and Periodicity in Properties

What is common in all the following species: N 3– , O 2– , F – , Na + , Mg 2+ , and Al 3+ ?

Options

  1. AThey all have the same number of protons.
  2. BThey all have the same atomic number.
  3. CThey all have an unstable electron configuration.
  4. DThey all have gained or lost electrons to achieve a stable electron configuration.

Correct answer

D. They all have gained or lost electrons to achieve a stable electron configuration.

Step-by-step solution

Correct Option is : (D) They all have gained or lost electrons to achieve a stable electron configuration.

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