Gadolinium belongs of 4f series. Its atomic number is 64. Which of the following is the correct electronic…

1. $\left[\mathrm{X}\mathrm{e}\right]4{\mathrm{f}}^{8}6{\mathrm{d}}^2$
2. $\left[\mathrm{X}\mathrm{e}\right]4{\mathrm{f}}^{9}5{\mathrm{s}}^1$
3. $\left[\mathrm{X}\mathrm{e}\right]4{\mathrm{f}}^{7}5{\mathrm{d}}^{1}6{\mathrm{s}}^2$
4. $\left[\mathrm{X}\mathrm{e}\right]4{\mathrm{f}}^{6}5{\mathrm{d}}^{2}6{\mathrm{s}}^2$

Solution

Asked in: NEET 2015 (Phase 2)

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