The electronic configuration of the element with atomic number 109 is:

Chemistry · NEET · NTA Exams — Classification of Elements and Periodicity in Properties

1. (n-1)d⁷ ns²
2. nd⁷ ns²
3. (n-1)d⁵ ns² np²
4. (n-1)d⁹ ns²

Answer

(A) (n-1)d 7 ns 2

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