* Sodium (Na) has 11 electrons.

* Electron orbitals fill in a specific order. The order is: 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, and so on.

* Sodium's electron configuration: 1s² 2s² 2p⁶ 3s¹

* Sodium has 3 occupied electron shells: 1s, 2s, 2p, and 3s.

Therefore, any element with 3 occupied electron shells will have the same number of electron orbitals as Sodium.

Here are a few examples:

* Magnesium (Mg): 1s² 2s² 2p⁶ 3s²

* Aluminum (Al): 1s² 2s² 2p⁶ 3s² 3p¹

* Silicon (Si): 1s² 2s² 2p⁶ 3s² 3p²

Important Note: While these elements have the same number of *occupied* shells, they have different numbers of *total* orbitals due to the increasing number of electrons and the filling of different sublevels.