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The conclusion that every additional ele...

The conclusion that every additional electron enters the orbital with lowest possible energy has been drawn from

A

Pauli's exclusion principle

B

Hund's rule

C

Aufbau principle

D

de-Broglie's equation.

Text Solution

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To solve the question, "The conclusion that every additional electron enters the orbital with the lowest possible energy has been drawn from," we need to identify the principle that describes this behavior of electrons in an atom. ### Step-by-Step Solution: 1. **Identify the Principle**: The principle that states that electrons occupy the lowest energy orbitals first is known as the **Aufbau Principle**. 2. **Explanation of the Aufbau Principle**: According to the Aufbau Principle, electrons fill atomic orbitals starting from the lowest energy level to the highest. This means that when adding electrons to an atom, they will first fill the orbitals with the least energy before moving to higher energy levels. 3. **Understanding the Implications**: The reason for this behavior is that lower energy configurations are more stable. By filling the lowest energy orbitals first, the atom minimizes its energy, leading to a more stable electronic configuration. 4. **Clarifying Other Principles**: - **Pauli Exclusion Principle**: This principle states that no two electrons can have the same set of quantum numbers in an atom. This means that each orbital can hold a maximum of two electrons with opposite spins. - **Hund's Rule**: This rule states that electrons will fill degenerate orbitals (orbitals of the same energy) singly before pairing up. This is to maximize the total spin and minimize electron-electron repulsion. - **De Broglie Wavelength**: While this relates to the wave nature of electrons, it does not directly address the filling order of orbitals. 5. **Conclusion**: Therefore, the conclusion that every additional electron enters the orbital with the lowest possible energy has been drawn from the **Aufbau Principle**. ### Final Answer: The conclusion that every additional electron enters the orbital with the lowest possible energy has been drawn from the **Aufbau Principle**. ---
To solve the question, "The conclusion that every additional electron enters the orbital with the lowest possible energy has been drawn from," we need to identify the principle that describes this behavior of electrons in an atom. ### Step-by-Step Solution: 1. **Identify the Principle**: The principle that states that electrons occupy the lowest energy orbitals first is known as the **Aufbau Principle**. 2. **Explanation of the Aufbau Principle**: According to the Aufbau Principle, electrons fill atomic orbitals starting from the lowest energy level to the highest. This means that when adding electrons to an atom, they will first fill the orbitals with the least energy before moving to higher energy levels. ...
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