Question

An element X belongs to IV period and 10th group in the periodic table. Give the valence shell electronic configuration of the element which is diagonal to the element X that belongs to 5th period

• A. $\left[Kr\right]4d^{6}5s^2$
• B. $\left[Kr\right]4d^{5}5s^2$
• C. $\left[Kr\right]4d^{10}5s^1$
• D. $\left[Kr\right]4d^{7}5s^2$

Answer 1

The correct option is C $\left[Kr\right]4d^{10}5s^1$

The element X belongs to IV period and tenth group is Ni. The element diagonal to it and of fifth period is Ag and Rh. Their configuration are $\left[Kr\right]4d^{10}5s^1$ and $\left[Kr\right]4d^{8}5s^1$ respectively.