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Within the same principal level, the more tightly held electron is the:
Af-electron
Bs-electron
Cp-electron
Dd-electron
Answer & Solution
Correct answer: B. s-electron
1. The comparison explains the boron and beryllium anomaly.
2. One kind of electron sits closer to the nucleus.
3. That is the s-electron.
_Source: NCERT Class 11 Chemistry Part I, Chapter 3, Classification of Elements and Periodicity in Properties._
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