1.

The outer electrons configuration of `Lu` (Atomic No.,71)` is :A. `4f^(3)5d^(5)6s^(2)`B. `4f^(8)5d^(0)6s^(2)`C. `4f^(4)5d^(4)6s^(2)`D. `4f^(14)5d^(1)6s^(2)`

Answer» Correct Answer - D


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