Multiple Choice
Which of the following is the ground-state electron configuration for zinc (Zn, atomic number 30)?
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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 neon (, atomic number )?
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is not valid notation; correct configuration is
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Verified step by step guidance1
Identify the atomic number of neon, which is 10. This means neon has 10 electrons to arrange in its ground-state electron configuration.
Recall the order in which electron orbitals are filled according to the Aufbau principle: 1s, 2s, 2p, 3s, 3p, and so on. Electrons fill the lowest energy orbitals first.
Start filling the orbitals with electrons: the 1s orbital can hold 2 electrons, so assign 2 electrons to 1s.
Next, fill the 2s orbital, which also holds 2 electrons, so assign 2 electrons to 2s.
Finally, place the remaining 6 electrons in the 2p orbital, which can hold up to 6 electrons. This completes the configuration for neon as \(1\text{s}^2 2\text{s}^2 2\text{p}^6\).
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