Question

what principle did heisenberg discover about electrons?
exclusion principle
quantum principle
probability principle
uncertainty principle

Explanation:

Heisenberg discovered the uncertainty principle, which states that it is impossible to simultaneously know both the position and the momentum of an electron (or any other particle) with perfect accuracy. The exclusion principle is related to Pauli, and the other - named "principles" in the options are not specifically associated with Heisenberg's major discovery about electrons.

Answer:

Uncertainty principle