Number of electron with spin +½ in n=3
Correct answer: C. 9
- A. 18
- B. 3
- C. 9
- D. 1
Explanation
This option is incorrect because, the 3p sublevel, which is one of the sublevels in n = 3, can hold a maximum of 6 electrons, and half of them will have spin +½. Therefore, the correct answer is not 18. This option is incorrect because, the number 3 does not correspond to any valid value for the number of electrons with spin +½ in the n = 3 energy level. The correct answer is 9 because, there are 9 electrons with spin +½ in the n = 3 energy level, specifically in the 3p sublevel. This option is incorrect. The number 1 does not represent the correct count of electrons with spin +½ in the n = 3 energy level.
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About Quantum Numbers
Quantum numbers describe an electron's energy level, subshell, orbital orientation and spin. You examine the principal, azimuthal, magnetic and spin quantum numbers, their allowed values, orbital capacity and how they determine electronic configurations and distinguish electrons within an atom.
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