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What is the electronic configuration of a neutral sodium atom?
What is the electronic configuration of a neutral sodium atom?
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Practice Questions
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Q1
What is the electronic configuration of a neutral sodium atom?
1s2 2s2 2p6 3s1
1s2 2s2 2p6
1s2 2s2 2p5
1s2 2s2 2p6 3s2
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Sodium has 11 electrons, and its configuration is 1s2 2s2 2p6 3s1.
Questions & Step-by-step Solutions
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Q
Q: What is the electronic configuration of a neutral sodium atom?
Solution:
Sodium has 11 electrons, and its configuration is 1s2 2s2 2p6 3s1.
Steps: 7
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Step 1: Understand that a neutral sodium atom has 11 electrons because its atomic number is 11.
Step 2: Electrons are arranged in energy levels or shells around the nucleus of the atom.
Step 3: The first energy level can hold a maximum of 2 electrons. So, we fill this level first: 1s2.
Step 4: The second energy level can hold a maximum of 8 electrons. We fill this level next: 2s2 2p6.
Step 5: Now we have used 10 electrons (2 in the first level and 8 in the second level). We have 1 electron left.
Step 6: The third energy level starts with the 3s subshell, where we place the last electron: 3s1.
Step 7: Combine all the filled subshells to write the complete electronic configuration: 1s2 2s2 2p6 3s1.
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