Which geologic time span covers the majority of Earth’s history?

Precambrian period

Explanation:

The precambrian period is the largest as it starts with the formation of earth and ends with the first sign of life(unicellular organisms)

if two electrons have the same n, the same ℓ, and the same ml, then they are in the same orbital. the pauli exclusion principle states that no two identical fermions (a fancy word for electrons and other subatomic particles like electrons) may occupy the same quantum state in an atom simultaneously.