key term - Quantum mechanics

Definition

Quantum mechanics is a branch of physics that studies the behavior of particles at atomic and subatomic levels. It explains phenomena that classical physics cannot, such as the dual wave-particle nature of electrons.

5 Must Know Facts For Your Next Test

1. Quantum mechanics introduces the concept of quantized energy levels, where electrons occupy discrete energy states.
2. The Heisenberg Uncertainty Principle states that it is impossible to simultaneously know both the exact position and momentum of an electron.
3. Schrödinger's equation describes how the quantum state of a physical system changes over time.
4. The Pauli Exclusion Principle asserts that no two electrons can have the same set of quantum numbers in an atom.
5. Orbitals are regions in an atom where there is a high probability of finding an electron, defined by quantum numbers.

Review Questions

Related terms

Heisenberg Uncertainty Principle:

A fundamental theory in quantum mechanics stating that it is impossible to simultaneously know both the exact position and momentum of a particle.

Schrödinger's Equation: A mathematical equation that describes how the quantum state of a system changes over time.

Pauli Exclusion Principle:

A principle stating that no two electrons within an atom can have identical sets of four quantum numbers.