* Electron Configuration: Sodium has an electron configuration of 1s² 2s² 2p⁶ 3s¹.

* Principal Quantum Numbers: The numbers in front of the orbitals (1, 2, and 3) represent the principal quantum numbers, which indicate the energy levels of the electrons.

* Electron Clouds: Each principal quantum number corresponds to a different electron cloud. So, sodium has three electron clouds: one for n=1, one for n=2, and one for n=3.

Note: While we talk about electron clouds, it's important to remember that electrons are not actually "clouds" but rather occupy specific energy levels and orbitals within the atom.