45107cbe_s___Physics___Particle_Physics__Answer
[Date Answered] August 21, 2007 [Questioner (age, location)] ARUSHI (INDIA) [Question] what are quantum numbers? [Answer] 
Quantum numbers describe conserved quantity in the quantum system. They often describe specifically the energies of electrons in atoms, but other possibilities include angular momentum, spin etc. Each electron has a set of four numbers, called quantum numbers, that specify it completely.
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