Which one is the correct ground state electronic configuration `:`

Options

A.
B.
C.
D.

Answer

To determine the correct ground state electronic configuration, we need to follow a systematic approach. Here’s a step-by-step solution:

### Step 1: Understand Ground State Electronic Configuration
The ground state electronic configuration refers to the arrangement of electrons in an atom's orbitals in their lowest energy state. The electrons fill the orbitals according to the Aufbau principle, Pauli exclusion principle, and Hund's rule.

### Step 2: Apply the Aufbau Principle
According to the Aufbau principle, electrons fill orbitals starting from the lowest energy level to the highest. The order of filling is as follows:
1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p.

### Step 3: Pairing Electrons
Once the orbitals are filled according to the Aufbau principle, we then pair the electrons in the same orbital. According to the Pauli exclusion principle, no two electrons in an atom can have the same set of quantum numbers, which means that each orbital can hold a maximum of two electrons with opposite spins.

### Step 4: Analyze the Given Options
Now, we need to analyze the provided options for the ground state electronic configuration:
- **Option A**: Check if it follows the filling order and pairing rules.
- **Option B**: Check if it correctly fills the orbitals without any higher energy state electrons being filled prematurely.
- **Option C**: Similar analysis as above.
- **Option D**: Similar analysis as above.

### Step 5: Identify the Correct Option
After analyzing each option based on the principles discussed:
- **Option B** is identified as the correct ground state electronic configuration since it adheres to the rules of filling and pairing without prematurely filling higher energy orbitals.

### Conclusion
The correct ground state electronic configuration is given by **Option B**.

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