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ChemistryInteger+4Question 19 of 69

IIT-JEE 2011 · Paper 1, Chemistry question 19

The maximum number of electrons that can have principal quantum number, n=3n=3, and spin quantum number, ms=−12m_s=-\frac12, is

Answer and worked solution

Official answer: 9

Orbitals with n = 3: n2=9n^2=9 (one 3s, three 3p, five 3d). Each holds one electron with ms=−12m_s=-\frac12.

Answer: 9

Topics:Quantum numbers
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