The valence shell electronic configuration of group 15 elements is `ns^2np^3`. Electronic configuration Bismuth is:

Options

A. `[He]2s^2 2p^5`
B. `[Xe]f^14 5d^10 6s^2 6p5`
C. `[Kr}4d^10 5s^2 5p^5`
D. `[Ar]3d^10 4s^2 4p^3`

Answer

To determine the electronic configuration of Bismuth (Bi), which is a group 15 element with the general valence shell electronic configuration of `ns^2np^3`, we will follow these steps:

### Step 1: Identify the Atomic Number of Bismuth
Bismuth has an atomic number of 83. This means it has 83 electrons.

### Step 2: Determine the Electron Configuration
We need to fill the electron configuration according to the Aufbau principle, Hund's rule, and the Pauli exclusion principle.

1. Start filling from the lowest energy level:
- 1s: 2 electrons → 1s²
- 2s: 2 electrons → 2s²
- 2p: 6 electrons → 2p⁶
- 3s: 2 electrons → 3s²
- 3p: 6 electrons → 3p⁶
- 4s: 2 electrons → 4s²
- 3d: 10 electrons → 3d¹⁰
- 4p: 6 electrons → 4p⁶
- 5s: 2 electrons → 5s²
- 4d: 10 electrons → 4d¹⁰
- 5p: 6 electrons → 5p⁶
- 6s: 2 electrons → 6s²
- 4f: 14 electrons → 4f¹⁴
- 5d: 10 electrons → 5d¹⁰
- 6p: 3 electrons → 6p³

### Step 3: Combine the Electron Configuration
Now, we can combine all the filled subshells to write the complete electron configuration for Bismuth:
- The configuration is:
- 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p³

### Final Answer
Thus, the complete electronic configuration of Bismuth (Bi) is:
**[Xe] 6s² 4f¹⁴ 5d¹⁰ 6p³**

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