Understanding Electron Configuration

The electron configuration of an atom describes the distribution of electrons in its ___.

In the electron configuration notation, the number before the letter represents the ___.

The maximum number of electrons in the second energy level is ___.

The electron configuration for oxygen is ___.

The ___ principle states that electrons occupy the lowest energy orbitals first.

In the electron configuration 1s² 2s² 2p⁶, the 'p' indicates the type of ___.

The Aufbau principle is used to determine the order of filling ___ in an atom.

The electron configuration for a sodium atom (Na) is ___.

The term 'valence electrons' refers to the electrons in the ___ shell.

The Pauli Exclusion Principle states that no two electrons in an atom can have the same ___.