The maximum number of unpaired electrons can present in `p_(x)` orbital is

Options

A. 0
B. 1
C. 2
D. 3

Answer

To determine the maximum number of unpaired electrons that can be present in the `p_(x)` orbital, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the p subshell**: The p subshell consists of three orbitals: `p_x`, `p_y`, and `p_z`. Each of these orbitals can hold a maximum of two electrons.

2. **Apply the Pauli Exclusion Principle**: According to the Pauli Exclusion Principle, no two electrons in an atom can have the same set of four quantum numbers. This means that each orbital can hold two electrons with opposite spins.

3. **Filling the orbitals**: When filling the p orbitals, electrons will first occupy each of the three orbitals singly before pairing begins. This is known as Hund's Rule.

4. **Maximum unpaired electrons in p orbitals**: In the case of the p subshell, if we fill the orbitals according to Hund's Rule, we can have one unpaired electron in each of the three p orbitals (`p_x`, `p_y`, and `p_z`). Therefore, the maximum number of unpaired electrons in the entire p subshell is three.

5. **Focus on the `p_x` orbital**: Since the question specifically asks about the `p_x` orbital, we note that it can hold a maximum of one unpaired electron when it is occupied by one electron. However, if we consider the scenario where all three p orbitals are filled according to Hund's Rule, `p_x` can have one unpaired electron.

6. **Conclusion**: Therefore, the maximum number of unpaired electrons that can be present in the `p_x` orbital is **1**.

### Final Answer:
The maximum number of unpaired electrons that can be present in the `p_x` orbital is **1**.