How does the quantum mechanical model describe electron location differently from Bohr's?

<p>The quantum mechanical model of the atom is a significant shift from orbits to orbitals. Though Bohr's atomic model was the beginning of understanding of how electrons move in fixed circular paths, it was Heisenberg's Uncertainty Principle that changed the view. It showed exact positions and velocities can't both be known. So definite orbits don't exist.</p><p>In the quantum mechanical model of atom, electrons are treated as waves and described by orbitals. These are regions where they are most likely to be found. These come from Schrödinger's wave function, where |? |² gives the probability of locating an electron. Each orbital is defined by three quantum numbers: n (energy level), l (shape), and ml (orientation).</p>

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