Orbital is

Explanation

**Step-by-Step Text Solution:**

1. **Definition of Orbital**: An orbital is defined as a region in an atom where there is a high probability of finding an electron. This concept is fundamental in quantum mechanics and atomic theory.

2. **Location**: Orbitals are located around the nucleus of an atom. They represent the three-dimensional space where electrons are likely to be found.

3. **Probability Density**: The term "probability" refers to the likelihood of finding an electron in a particular region of space. Orbitals are derived from the solutions to the Schrödinger equation, which describes how electrons behave in atoms.

4. **Types of Orbitals**: There are several types of orbitals, each with distinct shapes and energy levels. Common types include:
- **1s Orbital**: Spherical in shape and the closest orbital to the nucleus.
- **2s Orbital**: Also spherical but larger than the 1s orbital.
- **2p Orbitals**: Dumbbell-shaped and oriented along the x, y, and z axes.
- **3d Orbitals**: More complex shapes, often described as cloverleaf patterns.

5. **Energy Levels**: Each type of orbital corresponds to a specific energy level in an atom. As we move to higher principal quantum numbers (n), the energy and size of the orbitals increase.

6. **Conclusion**: In summary, an orbital is a defined space around the nucleus of an atom where the probability of finding an electron is maximized. Understanding orbitals is crucial for grasping the behavior of electrons in atoms and the formation of chemical bonds.

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