Electronic configuration of `H^-` is

Options

A. `1s^0`
B. `1s^1`
C. `1s^2`
D. `1s^1 2s^1`

Answer

To determine the electronic configuration of the hydrogen anion (H⁻), we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Atomic Number of Hydrogen (H)**:
- The atomic number of hydrogen (H) is 1. This means a neutral hydrogen atom has 1 electron.

2. **Determine the Charge of the Ion**:
- The hydrogen anion (H⁻) has a negative charge, indicating that it has gained one additional electron. Therefore, H⁻ has a total of 2 electrons.

3. **Write the Electronic Configuration**:
- The electronic configuration is written based on the number of electrons present. For H⁻, which has 2 electrons, we fill the lowest energy orbital first.
- The first energy level (n=1) can hold a maximum of 2 electrons in the 1s orbital.
- Therefore, the electronic configuration for H⁻ is 1s².

4. **Select the Correct Option**:
- Among the given options, the correct electronic configuration for H⁻ is 1s².

### Final Answer:
The electronic configuration of H⁻ is **1s²**.

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