Whichone of the following is not the representative element ?

Options

A. Fe
B. K
C. Ba
D. N

Explanation

To determine which of the following elements is not a representative element, we first need to understand what representative elements are. Representative elements are those found in the s and p blocks of the periodic table.

Let's analyze the options one by one:

1. **Iron (Fe)**: Iron is located in the d block of the periodic table. Therefore, it is not a representative element.

2. **Potassium (K)**: Potassium is located in the s block of the periodic table. It is an alkali metal and is considered a representative element.

3. **Barium (Ba)**: Barium is also located in the s block of the periodic table. It is an alkaline earth metal and is considered a representative element.

4. **Nitrogen (N)**: Nitrogen is located in the p block of the periodic table. It is considered a representative element.

After analyzing all the options, we find that:

- Iron (Fe) is the only element that does not belong to the s or p blocks, hence it is not a representative element.

**Conclusion**: The element that is not a representative element is **Iron (Fe)**.