The inner-transition elements belong to ________ block of the periodic table and are shown separately at the ________ of the periodic table.

Answer

To answer the question, "The inner-transition elements belong to ________ block of the periodic table and are shown separately at the ________ of the periodic table," we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Blocks of the Periodic Table**:
- The periodic table is divided into four main blocks: S block, P block, D block, and F block.
- The S block includes alkali and alkaline earth metals, the P block includes groups like the boron family and halogens, and the D block consists of transition metals.

2. **Determine the Block for Inner-Transition Elements**:
- Inner-transition elements are specifically those elements that are found in the F block of the periodic table.
- These elements include the lanthanides and actinides, which are characterized by the filling of the 4f and 5f orbitals, respectively.

3. **Locate the Position of Inner-Transition Elements**:
- Inner-transition elements are not placed in the main body of the periodic table but are instead shown separately at the bottom of the periodic table.
- This separation is done for clarity and to maintain the structure of the periodic table.

4. **Fill in the Blanks**:
- Based on the information gathered, we can fill in the blanks:
- The inner-transition elements belong to the **F block** of the periodic table and are shown separately at the **bottom** of the periodic table.

### Final Answer:
The inner-transition elements belong to **F block** of the periodic table and are shown separately at the **bottom** of the periodic table.

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