Multiple Choice
Which of the following is the correct electron configuration for a nitrogen atom?
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10. Periodic Properties of the Elements
The Electron Configuration
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Which of the following is the correct electron configuration for neon (Ne)?
A
1s^2 2s^2 2p^2
B
1s^2 2s^2 2p^6
C
1s^2 2s^2 2p^5
D
1s^2 2s^2 2p^4
Verified step by step guidance1
Step 1: Identify the atomic number of neon (Ne), which is 10. This means neon has 10 electrons to be arranged in its electron configuration.
Step 2: Recall the order in which electron orbitals are filled according to the Aufbau principle: 1s, 2s, 2p, 3s, and so on.
Step 3: Fill the 1s orbital first, which can hold up to 2 electrons, so write $1s^{2}$.
Step 4: Next, fill the 2s orbital, which also holds 2 electrons, so write $2s^{2}$.
Step 5: Finally, place the remaining 6 electrons in the 2p orbital, which can hold up to 6 electrons, so write $2p^{6}$. Combine all to get the full electron configuration: $1s^{2} 2s^{2} 2p^{6}$.
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