Question

Which orbital is partially filled in the Zirconium (ZI) atom?

Answer 1

4d orbital.

Step-by-step explanation:

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In this case, since zirconium's atomic number is 40, we fill in the electron configuration up to 40 as shown below:

`1s^2,2s^2,2p^6, 3s^2,3p^6,4s^2,3d^(10),4p^6,5s^2,4d^2`

Thus, the orbital 4d is partially filled.

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