Which of the following is the ground state of an atom? Which is its excited state? Which is an impossible electron configuration? Identify the element and briefly explain your choices. a) 1s2 2s2 2p6 3s2 3p6 5p1 b) 1s2 s2s 2p6 3s2 3p6 3d10 4s1 c) 1s2 2s2 2p6 3s2 3p7

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anonymous · Answer

a. Is K and is in an excited state. b. Is Cu and is in ground state c. Is impossible because the p rings can only hold 6. ( 2 in px 2 in py and 2 in pz )