Imagine that an electron had a spin of 5/2 so that its spin quantum number,m_s,could have the following six values: m_s = +5/2,+3/2,+1/2,-1/2,-3/2,and -5/2.If this were true,the first element with a filled shell would be A)He with 2 electrons. B)Be with 4 electrons. C)C with 6 electrons. D)O with 8 electrons.

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Quizplus · Accepted Answer

The first element with a filled shell would be C with 6 electrons because each of the six spin states could be occupied by two electrons, giving a total of 12 electrons in the first shell.

Imagine That an Electron Had a Spin of 5/2 So