Few general names are given along with their valence shell configurations.Mark the incorrect name.

Options

A. `ns^(2)np^(6)`-Noble gases
B. `ns^(2)np^(5)`Halogens
C. `ns^(1)`-Alkali metals
D. `ns^(2)np^(2)`-Chalcogens

Explanation

To solve the question regarding the incorrect name associated with the given valence shell configurations, let's analyze each option step by step.

### Step 1: Analyze the first option - Noble gases
- **Valence shell configuration given**: \( n^2 n^6 \)
- **Group**: Noble gases belong to Group 18.
- **Valence electrons**: Noble gases have a completely filled valence shell, which means they have 8 electrons in their outermost shell.
- **Conclusion**: The configuration \( n^2 n^6 \) indicates 8 electrons (2 from \( n^2 \) and 6 from \( n^6 \)), which is correct for noble gases.

### Step 2: Analyze the second option - Halogens
- **Valence shell configuration given**: \( n^2 n^5 \)
- **Group**: Halogens belong to Group 17.
- **Valence electrons**: Halogens have 7 electrons in their valence shell.
- **Conclusion**: The configuration \( n^2 n^5 \) indicates 7 electrons (2 from \( n^2 \) and 5 from \( n^5 \)), which is correct for halogens.

### Step 3: Analyze the third option - Alkali metals
- **Valence shell configuration given**: \( n^1 \)
- **Group**: Alkali metals belong to Group 1.
- **Valence electrons**: Alkali metals have 1 electron in their valence shell.
- **Conclusion**: The configuration \( n^1 \) indicates 1 electron, which is correct for alkali metals.

### Step 4: Analyze the fourth option - Chalcogens
- **Valence shell configuration given**: \( n^2 n^2 \)
- **Group**: Chalcogens belong to Group 16.
- **Valence electrons**: Chalcogens have 6 electrons in their valence shell.
- **Conclusion**: The configuration \( n^2 n^2 \) indicates 4 electrons (2 from \( n^2 \) and 2 from \( n^2 \)), which is incorrect for chalcogens. The correct configuration should be \( n^2 n^4 \) to indicate 6 valence electrons.

### Final Conclusion
The incorrect name associated with the given valence shell configuration is for the chalcogens, as the configuration \( n^2 n^2 \) does not correctly represent the number of valence electrons they have.

### Answer
The incorrect option is: **NH2NP2 (Chalcogens)**.

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