Write general configuration of inner transition element. what is the important of the element?

Explanation

### Step-by-Step Solution

1. **Understanding Inner Transition Elements**:
- Inner transition elements are those elements in which the last electron enters the f-orbital. These elements are found in the lanthanide and actinide series of the periodic table.

2. **General Electronic Configuration**:
- The general electronic configuration for inner transition elements can be expressed as:
\[ [Xe] \, n-2f^{1-14} \, n-1d^{0-10} \, ns^2 \]
- Here, \(n\) represents the principal quantum number corresponding to the outermost shell, and \(x\) represents the noble gas core preceding the element in the periodic table.

3. **Breaking Down the Configuration**:
- The notation \(n-2f^{1-14}\) indicates that the f-orbitals can hold a maximum of 14 electrons (from 1 to 14).
- The \(n-1d^{0-10}\) notation indicates that the d-orbitals can hold a maximum of 10 electrons (from 0 to 10).
- The \(ns^2\) indicates that the outermost s-orbital can hold 2 electrons.

4. **Importance of Inner Transition Elements**:
- Inner transition elements have significant applications in various fields:
- **Production of Sunglass Lenses**: Certain inner transition elements are used in the manufacturing of lenses due to their optical properties.
- **Nuclear Applications**: Elements like uranium and plutonium are crucial in the production of nuclear weapons and are also used in nuclear power plants for electricity generation.