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

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प्रश्न

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

विकल्प

  • [Ne] 3s2

  • [Ar] 4s2

  • [Ne] 3s1

  • [Ar] 4s1

MCQ

उत्तर

[Ar] 4s2

Explanation:

\[\ce{Ca20 -> [Ar] 4s^2}\]

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