1. (a) List the six possible sets of quantum numbers (n, l, mĮ, m) of a 2p electron. (b) Suppose that we have an atom such as carbon, which has two 2p electrons. Ignoring the Pauli principle, how many different possible combina- tions of quantum numbers of the two electrons are there? (c) How many of the possible combinations of part (b) are eliminated by applying the Pauli principle? (d) Sup- pose that carbon is in an excited state with the configu- ration 2p¹3pl. Does the Pauli principle restrict the choice of quantum numbers for the electrons? How many dif- ferent sets of quantum numbers are possible for the two electrons?

1. (a) List the six possible sets of quantum numbers (n, l, mĮ, m) of a 2p electron. (b) Suppose that we have an atom such as carbon, which has two 2p electrons. Ignoring the Pauli principle, how many different possible combina- tions of quantum numbers of the two electrons are there? (c) How many of the possible combinations of part (b) are eliminated by applying the Pauli principle? (d) Sup- pose that carbon is in an excited state with the configu- ration 2p¹3pl. Does the Pauli principle restrict the choice of quantum numbers for the electrons? How many dif- ferent sets of quantum numbers are possible for the two electrons?