What are those elements which belong to Groups 1,2, 13, 14, 15, 16, 17.

Options

A. Typical elements.
B. Representative elements
C. Bridge elements.
D. Transition elements

Answer

To solve the question regarding the elements that belong to Groups 1, 2, 13, 14, 15, 16, and 17 of the periodic table, we will follow these steps:

### Step-by-Step Solution:

1. **Understanding the Groups**:
- The periodic table is organized into groups (columns) and periods (rows). Each group contains elements with similar properties.
- Groups 1 and 2 are known as the s-block elements, while Groups 13 to 17 are known as the p-block elements.

2. **Identifying the Groups**:
- Group 1: Alkali metals (e.g., Lithium, Sodium)
- Group 2: Alkaline earth metals (e.g., Beryllium, Magnesium)
- Group 13: Boron group (e.g., Boron, Aluminum)
- Group 14: Carbon group (e.g., Carbon, Silicon)
- Group 15: Nitrogen group (e.g., Nitrogen, Phosphorus)
- Group 16: Chalcogens (e.g., Oxygen, Sulfur)
- Group 17: Halogens (e.g., Fluorine, Chlorine)

3. **Classifying the Elements**:
- The elements in these groups primarily fill the s and p orbitals.
- Elements that fill the s and p orbitals are referred to as "representative elements."

4. **Choosing the Correct Option**:
- The options provided are:
1. Typical elements
2. Representative elements
3. Bridge elements
4. Transition elements
- Since Groups 1, 2, 13, 14, 15, 16, and 17 correspond to the s and p blocks, the correct classification is "representative elements."

5. **Conclusion**:
- Therefore, the elements that belong to Groups 1, 2, 13, 14, 15, 16, and 17 are classified as **representative elements**.

### Final Answer:
The elements that belong to Groups 1, 2, 13, 14, 15, 16, and 17 are known as **representative elements**.

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