Final answer:
The uncertainty principle expresses a limit on our knowledge of the location and momentum of an electron.
Step-by-step explanation:
The named after Heisenberg, the uncertainty principle expresses a limit on our knowledge of the location and momentum of an electron. It was first stated by Werner Heisenberg in 1929 as a result of his work on quantum mechanics and the wave characteristics of particles. According to the principle, it is impossible to simultaneously measure the position and momentum of an electron with absolute accuracy. The more precisely one quantity is known, the less precisely the other can be determined. This principle is fundamental to our understanding of the behavior of particles at the quantum level.