In what respect electronic configuration of hydrogen and halogens are similar ?

Options

A. Hydrogen and halogens have one electron in their outermost shell .
B. Hydrogen and halogens have one electron less then the noble gas configuration.
C. Hydrogen and halogens can lose one electron to form positive ions.
D. Hydrogen and halogens show noble gas configuration.

Explanation

To answer the question regarding the similarities in the electronic configuration of hydrogen and halogens, we can break down the solution into clear steps:

### Step-by-Step Solution:

1. **Understanding Electronic Configuration**:
- Hydrogen has an atomic number of 1, which means it has 1 electron. Its electronic configuration is 1s¹.
- Halogens (group 17 elements) have 7 electrons in their outermost shell. For example, Fluorine (F) has an atomic number of 9, with an electronic configuration of 1s² 2s² 2p⁵.

2. **Noble Gas Configuration**:
- Hydrogen can achieve a noble gas configuration by gaining 1 electron, resulting in the configuration of Helium (1s²).
- Halogens can also achieve a noble gas configuration by gaining 1 electron. For example, Fluorine (F) gains 1 electron to become F⁻, achieving the configuration of Neon (1s² 2s² 2p⁶).

3. **Formation of Ions**:
- Both hydrogen and halogens can form ions to achieve a stable electronic configuration.
- Hydrogen can lose its single electron to form a positive ion (H⁺) or gain one electron to form a negative ion (H⁻).
- Halogens typically gain one electron to form negative ions (e.g., F⁻) but do not usually lose electrons to form positive ions.

4. **Conclusion**:
- The similarity in the electronic configuration of hydrogen and halogens lies in their ability to achieve a stable noble gas configuration by either gaining or losing electrons. Both can attain a stable state through the addition of one electron.

### Final Answer:
The electronic configuration of hydrogen and halogens is similar in that both can achieve a noble gas configuration by gaining one electron. Hydrogen can gain one electron to resemble the configuration of helium, while halogens can gain one electron to resemble the configuration of the nearest noble gas (e.g., Fluorine gains one electron to become like Neon).

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