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A fermion question from a Chemistry teacher



A chemistry colleague posted this question on an IB website. I do not kow the answer and hope one of you would help us with wisdom a website or both. The teacher is in Argentina and books are not easily available she says.

Thank you

Ken Fox


Question:
I am an intruder from the Chemistry page in bad need of your expertise. The doubts are related to the fermionic states, the school's term is beginning in a fortnight and I would like to be ready for my students questions:
a) Can bosons break Pauli's exclusion principle??? How do you explain this please??
b) Can somebody briefly explain how is it that paired fermions may behave as bosons?? Is it because of the spin number???Does it mean that they can go from not being able to break Pauli's principle to be able to do so??