If the electronic configuration of an element is `1s^(2)2s^(2)2p^(2)3s^(2)3p^(6)3d^(2)4s^(2)`, four electrons involved in chemical bond formation will be ……… .

Options

A. `3p^(6)`
B. `3p^(6),4s^(2)`
C. `3p^(6),3d^(2)`
D. `3d^(2),4s^(2)`

Explanation

To determine the four electrons involved in chemical bond formation for the element with the electronic configuration `1s^(2)2s^(2)2p^(2)3s^(2)3p^(6)3d^(2)4s^(2)`, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Element**:
- The given electronic configuration is `1s^(2)2s^(2)2p^(2)3s^(2)3p^(6)3d^(2)4s^(2)`.
- To find the atomic number, we sum the superscripts:
- \(2 + 2 + 2 + 2 + 6 + 2 + 2 = 22\).
...