How did the uncertainty principle influence thinking about the arrangement of electrons in atoms?
Scientists realized that electrons did not continually lose energy.

Scientists realized that electrons could move from one energy level to another.

Scientists realized that electrons could not be located in defined orbits.

Scientists realized that electrons have different energies depending on their location within an atom.

According to Heisenberg's principle "At the instant of time when the position is determined, that is, at the instant when the photon is scattered by the electron, the electron undergoes a discontinuous change in momentum. This change is the greater the smaller the wavelength of the light employed, i.e., the more exact the determination of the position. At the instant at which the position of the electron is known, its momentum therefore can be known only up to magnitudes which correspond to that discontinuous change; thus, the more precisely the position is determined, the less precisely the momentum is known".

Hence, this principle made scientists to realize that electrons could not be located in defined orbits which a contradictory of Bohr's model.