Wave functions of electrons in atoms and molecules are called...............

Answer

**Step-by-Step Solution:**

1. **Understanding Wave Functions**: In quantum mechanics, a wave function is a mathematical description of the quantum state of a system. It contains all the information about the system, including the probabilities of finding particles in various positions.

2. **Probability Amplitude**: The wave function is often denoted by the Greek letter psi (Ψ). The square of the wave function's modulus (|Ψ|²) gives the probability density of finding an electron in a particular region of space.

3. **Defining Orbitals**: An orbital is defined as a region in space where there is a high probability of finding an electron. It is derived from the wave function and represents the spatial distribution of electrons around the nucleus of an atom.

4. **Conclusion**: Since the wave function describes the behavior of electrons and the regions where they are likely to be found, the wave functions of electrons in atoms and molecules are referred to as "orbitals."

**Final Answer**: Wave functions of electrons in atoms and molecules are called **orbitals**.

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