An electron inside a hydrogen atom is confined to within a space of about 0.110 nm. If the electron mass is 9.11 ˛ 10-31 kg, what is the uncertainty in the electron's velocity?

Heisenberg's Uncertainty Principle: The position and momentum of a particle cannot both be measured precisely at the same time.

The Pauli exclusion principle: No two electrons in an atom can occupy the same quantum state.