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Question:

Quantum Numbers, Valence Electrons, Orbitals?

1) What is the total number of s electrons in a single (ground state) K atom?2) What is the principal quantum number (n) for the valence electrons in aluminum?3) If a graph represents the radial probability distribution for an electron in a p-orbital, what is its principal quantum number (n)?Thank you.

Answer:

1If by K you mean potassium, then there are a total of 7 electrons in s orbitals for a neutral, ground (lowest energy) state potassium atomThere are 2 electrons in the 1s state, 2 in the 2s state, 2 in the 3s state, and 1 in the 4s state2The valence electrons in neutral, ground state aluminum are in n33It depends on what the graph looks likeThe graphs of the probability distribution for 2p, 3p, etc look different from each otherThe 2p probability distribution function has 2 lobes, the 3p has 4 lobes.

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