Asked by Megan
Given the following three electron configurations:
1s2 2s2 2p5
How many core electrons does this element have?
A. 4
B. 5
C. 9
D. 2
1s2 2s2 2p5
How many core electrons does this element have?
A. 4
B. 5
C. 9
D. 2
Answers
Answered by
DrRebel
D: 2 core electrons
The valence level in an electron configuration is the highest principle quantum number. Using the Afbau symbology that would be highest Principle Quantum Number for the element in question => in this case n = 2. The 1s² is the core configuration with 2 electrons, and 2s²2p⁵ is the valence configuration with 5 electrons.
The valence level in an electron configuration is the highest principle quantum number. Using the Afbau symbology that would be highest Principle Quantum Number for the element in question => in this case n = 2. The 1s² is the core configuration with 2 electrons, and 2s²2p⁵ is the valence configuration with 5 electrons.
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.