The maximum number of electron accommodated in a shell or energy level is calculated by formula _.
Correct answer: B. 2n2
- A. n2
- B. 2n2
- C. 2n
- D. 3n
Explanation
Option BThe number of electrons accommodated in an orbit is given by 2n2. This rule is used to determine the number of electrons in a particular shell.
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Electronic configuration describes how electrons occupy shells, subshells and orbitals around an atom. Questions use the Aufbau principle, Pauli exclusion principle and Hund's rule to write configurations, identify valence electrons, form ions and explain periodic trends, including common exceptions such as chromium and copper.
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