The space or three-dimensional region round the nucleus where there is maximum probability of finding an electron of specific energy is called an____

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the term that describes the three-dimensional region around the nucleus of an atom where there is a high probability of finding an electron with a specific energy.

2. **Defining the Term**: The region described in the question is known as an "orbital." An orbital is a mathematical function that describes the wave-like behavior of electrons in an atom and represents the probability distribution of an electron's position.

3. **Types of Orbitals**: There are four main types of orbitals:
- **s orbitals**: These are spherical in shape and can hold a maximum of 2 electrons.
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