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MHT CET202014 Oct 2020Evening ShiftChemistryClassification of Elements and Periodicity in PropertiesActual

What is the electronic configuration of third element of group-2 in periodic table?

Options

  1. A[ Ne ] 3 ~S ¹
  2. B[ Ne ] 3 ~S ²
  3. C[ Ar ] 4 ~S ¹
  4. D[ Ar ] 4 ~S ²

Correct answer

D. [ Ar ] 4 ~S ²

Step-by-step solution

Third element of group 2 is calcium- Ca. atomic number 20 electronic configuration: [Ar] 4s2

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