Multiple Choice
Which is the correct simplified electron configuration for carbon?
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9. Electrons in Atoms and the Periodic Table
The Electron Configuration (Simplified)
Multiple Choice
What is the ground-state electron configuration of boron (B, atomic number 5) using simplified orbital notation?
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Verified step by step guidance1
Identify the atomic number of boron, which is 5. This means boron has 5 electrons to place in orbitals according to the Aufbau principle.
Recall the order in which orbitals are filled: first the 1s orbital, then the 2s orbital, and then the 2p orbitals.
Fill the 1s orbital with 2 electrons, since it can hold a maximum of 2 electrons. This gives us \(1\,s^{2}\).
Next, fill the 2s orbital with 2 electrons, also fully occupying it. This adds \(2\,s^{2}\) to the configuration.
Finally, place the remaining 1 electron in the 2p orbital, which can hold up to 6 electrons. This completes the configuration as \(2\,p^{1}\).
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