11. Which is the correct electron configuration for the element Zirconium? 1s^22s^22p^63s^23p^64s^24d^104p^65s^25d^2 1s^22s^22p^63s^23p^64s^23d^104p^65s^25p^2 1s^22s^22p^63s^23p^64s^23d^104p^65d^4 1s^22s^22p^63s^23p^64s^23d^104p^65s^24d^2

To determine the correct electron configuration for zirconium (Zr), we need to know its atomic number, which is 40. This means zirconium has 40 electrons.<br /><br />The electron configuration is built by filling the orbitals in order of increasing energy levels, following the Aufbau principle, Hund's rule, and the Pauli exclusion principle. The order of filling is generally:<br /><br />1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, ...<br /><br />Following this order, the electron configuration for zirconium is:<br /><br />- \(1s^2\)<br />- \(2s^2\)<br />- \(2p^6\)<br />- \(3s^2\)<br />- \(3p^6\)<br />- \(4s^2\)<br />- \(3d^{10}\)<br />- \(4p^6\)<br />- \(5s^2\)<br />- \(4d^2\)<br /><br />Therefore, the correct electron configuration for zirconium is:<br /><br />\(1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^{10} 4p^6 5s^2 4d^2\)