Question

Please select statements that satisfy the Pauli exe a) Electron state can hold no more than two electrons. b) Electrons with the same state must have opposite spins. c) Electron state can hold no more than four electrons. d) Electrons with the same state must have the same spins. its that satisfy the Pauli exclusion principle.

Answer 1

Answer:

Options A and B

Explanation:

The Pauli Exclusion Principle states that, in an atom or molecule, no two electrons can have the same four electronic quantum numbers. As an orbital can contain a maximum of only two electrons, the two electrons must have opposing spins.

Going through the options;

Option A - An electron shell can have more than two electrons. An orbital however can hold a maximum of two electrons.

Option B - This is correct because No two electrons in a atom can have the same four quantum numbers . This means that only two electrons are allowed in the same orbital, and then they have opposite spin, +1/2 and -1/2.

Option C  - Each electron orbital (state) can only contain a maximum of two lectrons.

Option D - This is wrong because no two electrons in a atom can have the same four quantum numbers . This means that only two electrons are allowed in the same orbital, and then they must have opposite spin, +1/2 and -1/2.

Answer 2

Answer:

b) Electrons with the same state must have opposite spins.

Explanation:

Pauli Exclusion Principle-

The principle states that in an atom or in a molecule, no two electrons present can have same set of the four quantum numbers.  

Even if the two electrons are present in same state which means that if it is present in the same orbital , n, l and m are same but still the forth quantum number which is spin quantum number is different for them. Both the two electrons have opposing spins having value either $\frac {1}{2}$ or $\frac {-1}{2}$.

Hence, option B is correct.