Give general electronic configuration of `f`-block elements.

Explanation

To determine the general electronic configuration of the `f`-block elements, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Block**:
- The `f`-block elements are those elements in which the `f` orbitals are being filled with electrons. These include the lanthanides and actinides.

2. **Understand the Orbital Filling**:
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