Imagine a universe in which white walkers exist. In this world, the value of the

Question

Imagine a universe in which white walkers exist. In this world, the value of the spin quantum number can have three values (instead of just two), m_s = -1/2, 0, +1/2. Assuming that all other quantum numbers can take only the possible values in our world and that all of the other rules of quantum mechanics apply (including the Pauli Exclusion Principle), determine. the electron configuration of Neon the number of the clement with a completed n = 2 principal energy level the number of unpaired electrons in fluorine.

Explanation / Answer

(A) Since we have 3 spin quantum numbers,

1s can have 3 electrons

2s can have 3 electrons and the remaining 4 in 2p orbital.

So, electronic configuration is 1s32s32p4

(B)

Completion of 2 energy level means 1s + 2s+ 2p should be filled

1s we have 3 electrons

2s we have 3 electrons

2p we have 3x3 = 9 electrons

Total electrons = 9+3+3 = 15 elctrons.

(C)

Fluorine contains 9 electrons.

So, configuration is 1s32s32p3

The number of unpaired electrons = 1 electron in1s + 1 electron in 2s + 3 electrons in 2p

= 5 elctrons

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