Which of the following sequences contain atomic numbers of only representative elements ?

Options

A. 3,33,53,87
B. 2,10,22,36
C. 7,17,25,37,48
D. 9,35,51,88

Explanation

To determine which sequences contain atomic numbers of only representative elements, we need to understand what representative elements are. Representative elements are found in the s and p blocks of the periodic table.

### Step-by-Step Solution:

1. **Identify the Representative Elements**:
- Representative elements include all elements in the s block (Groups 1 and 2) and p block (Groups 13 to 18) of the periodic table.
- The atomic numbers for these elements range from 1 (Hydrogen) to 86 (Radon).

2. **Identify the Non-Representative Elements**:
- The d block elements (transition metals) have atomic numbers from 21 to 30, 39 to 48, 57 to 80, and 89 to 112.
- The f block elements (inner transition metals) have atomic numbers from 58 to 71 and 90 to 103.

3. **Analyze Each Option**:
- For each option provided, check if all atomic numbers fall within the range of representative elements (1 to 86) and do not include any atomic numbers from the d or f blocks.

4. **Determine the Correct Options**:
- After analyzing the options, we find that:
- **Option 1**: Contains only atomic numbers of representative elements.
- **Option 4**: Also contains only atomic numbers of representative elements.
- **Options 2 and 3**: Include atomic numbers that belong to transition or inner transition elements.

5. **Conclusion**:
- The sequences that contain atomic numbers of only representative elements are **Option 1 and Option 4**.