Gadolinium belongs to 4f series. It’s atomic number is 64. Which of the following is the correct electronic configuration of gadolinium?
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- $[\text{Xe}]\ 4\text{f}^7\ 5\text{d}^1\ 6\text{s}^2$
Gadolinium belongs to 4f series it has atomic no. = 64. It has extra stability due to half-filled 4f sub shell.
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