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FILLING OF ATOMIC ORBITALS- AUFBAU PRINC...

FILLING OF ATOMIC ORBITALS- AUFBAU PRINCIPLE

A

3d, 4s, 4p, 4d, 5s

B

4s, 3d, 4p, 5s, 4d

C

5s, 4p, 3d, 4d, 5s

D

3d, 4p, 4s, 4d, 5s

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### Step-by-Step Solution for Filling of Atomic Orbitals According to the Aufbau Principle: 1. **Understanding the Aufbau Principle**: The Aufbau principle states that electrons occupy the lowest energy orbitals first before moving to higher energy orbitals. This means that when filling atomic orbitals, we start with the orbital that has the least energy. 2. **Order of Orbital Filling**: The order of filling the atomic orbitals can be determined based on their energy levels. The general 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 3. **Identifying Energy Levels**: In the context of the question, we need to identify the energy levels of specific orbitals mentioned: - 1s < 2s < 2p < 3s < 3p < 4s < 3d < 4p < 5s < 4d 4. **Filling Order for Given Orbitals**: According to the Aufbau principle, the filling order for the orbitals mentioned in the question is: - Fill 4s first (as it has lower energy than 3d) - Then fill 3d - Next, fill 4p - After that, fill 5s - Finally, fill 4d 5. **Conclusion**: Based on the above filling order, the correct sequence for filling the orbitals is: - 4s → 3d → 4p → 5s → 4d ### Final Answer: The correct order of filling according to the Aufbau principle is: **4s, 3d, 4p, 5s, 4d**. ---
### Step-by-Step Solution for Filling of Atomic Orbitals According to the Aufbau Principle: 1. **Understanding the Aufbau Principle**: The Aufbau principle states that electrons occupy the lowest energy orbitals first before moving to higher energy orbitals. This means that when filling atomic orbitals, we start with the orbital that has the least energy. 2. **Order of Orbital Filling**: The order of filling the atomic orbitals can be determined based on their energy levels. The general order of filling is as follows: - 1s - 2s - 2p ...
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