Here's why:

* The Bohr Model: The old model of the atom, known as the Bohr model, pictured electrons orbiting the nucleus in fixed, circular paths like planets around the sun. This model is no longer considered accurate.

* The Quantum Mechanical Model: The current model, called the quantum mechanical model, describes electrons as existing in probability clouds, not fixed paths. These clouds represent the regions where an electron is most likely to be found. These regions are called orbitals.

* Orbitals: Orbitals are not flat, circular paths. They are complex, three-dimensional shapes that define the probability of finding an electron in a specific region of space around the nucleus. Different orbitals have different shapes and energy levels.

So, while we can't say exactly where an electron is at any given moment, we can describe the probability of finding it in a specific region around the nucleus using the concept of electron clouds or orbitals.