Which one is a wrong statement ?

Options

A. The electronic configuration of N atom is

B. An orbital is designated by three quantum numbers while an electron in an atom is designated by four quantum numbers.
C. Total orbital angular momentum of electron is 's' orbital is equal to zero.
D. The value of m for `d_z` is zero.

Answer

To determine which statement is incorrect regarding the electronic configuration of nitrogen and its quantum numbers, we will analyze the provided information step by step.

### Step 1: Understand the Electronic Configuration of Nitrogen
- Nitrogen has an atomic number of 7, meaning it has 7 electrons.
- The correct electronic configuration is:
- 1s² 2s² 2p³
- This means:
- 2 electrons in the 1s orbital
- 2 electrons in the 2s orbital
- 3 electrons in the 2p orbital

### Step 2: Analyze the Statements
1. **Filling of Electrons in Orbitals**:
- The statement mentions that electrons fill orbitals in a way that each orbital gets one electron first (in parallel spin) before pairing. This is known as Hund's Rule and is correct.

2. **Quantum Numbers for Orbitals**:
- It states that to describe an orbital, you need three quantum numbers (n, l, m). This is correct.
- To describe an electron in an orbital, you need four quantum numbers (n, l, m, and s). This is also correct.

3. **Angular Momentum of Orbitals**:
- The statement regarding the angular momentum of the s orbital being zero is correct since the azimuthal quantum number (l) for s orbitals is 0, leading to zero angular momentum.

4. **Incorrect Statement**:
- The incorrect statement in the video is the electronic configuration initially provided, which incorrectly lists multiple 3s orbitals and fails to correctly represent the 2p electrons.

### Conclusion
The wrong statement is the one that incorrectly describes the electronic configuration of nitrogen.

### Final Answer
The wrong statement is the incorrect electronic configuration of nitrogen, which should be 1s² 2s² 2p³ instead of the incorrect representation given in the video.

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