Third peroid of th periodic table contains the following number of elements.

Options

A. 2
B. 18
C. 8
D. 32

Explanation

To determine how many elements are present in the third period of the periodic table, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of the Periodic Table**:
- The periodic table is organized into periods (horizontal rows) and groups (vertical columns).
- Each period corresponds to the filling of electron shells.

2. **Identify the Third Period**:
- The third period is the third row in the periodic table.
- It includes elements that fill the 3rd electron shell.

3. **List the Elements in the Third Period**:
- The elements in the third period are:
1. Sodium (Na)
2. Magnesium (Mg)
3. Aluminum (Al)
4. Silicon (Si)
5. Phosphorus (P)
6. Sulfur (S)
7. Chlorine (Cl)
8. Argon (Ar)

4. **Count the Elements**:
- By counting the elements listed, we find that there are 8 elements in the third period.

### Final Answer:
The third period of the periodic table contains **8 elements**.

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