Multiple Choice
Which electron configuration represents a violation of Hund's Rule?
2. Atoms and the Periodic Table
The Electron Configuration (Simplified)
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Write the ground state electron configuration for the following element:
Magnesium (Z = 12)
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Verified step by step guidance1
Identify the atomic number of magnesium, which is Z = 12. This means magnesium has 12 electrons in its neutral state.
Recall the order of filling electron orbitals according to the Aufbau principle: 1s, 2s, 2p, 3s, 3p, etc.
Start filling the orbitals with electrons, beginning with the lowest energy level: 1s can hold 2 electrons, so fill it as 1s^2.
Next, fill the 2s orbital, which can also hold 2 electrons: 2s^2.
Continue to the 2p orbital, which can hold up to 6 electrons: 2p^6. Finally, place the remaining 2 electrons in the 3s orbital: 3s^2.
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