Multiple choice

Calculate the maximum number of electrons? In spin quantum number ms = -1/2 and principal quantum number is n = 2.

  1. 2na = 8, ms = 4

  2. 2na = 18, ms = 9

  3. 2na = 6, ms = 3

  4. 2na = 14, ms = 7

  5. 2na = 14, ms = 4
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A Correct answer
Explanation

For principal quantum number (n = 2)
Number of orbitals = n2 = 4 Total no. of electrons = 2n2 = 2 x 4 = 8 So, number of electrons with ms = -1/2 will be 4.

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